MATH 225N Week 7 Assignment: Hypothesis Test for the Mean – Population Standard Deviation Known

MATH 225N Week 7 Assignment: Hypothesis Test for the Mean – Population Standard Deviation Known

1. Question: Which graph below corresponds to the following hypothesis test?
2. Question: Suppose a pitcher claim that his pitch speed is less than 43 mph on average. several of his teammates do not believe him so the pitcher decides to do a hypothesis test at 10% significance level to pursued them. He throws 19 pitches. the main speed of the sample pictures is 35 mph. the picture knows from experience that the standard deviation for his pitch speed is 6 mph. what is the test statistic of this 1 mean hypotheses test round to 2 decimal places?
3. Question: identify the type of hypothesis test below?
4. Question: Rosita a picture claim that her pitch speed is not equal to 59 mph. on average, several of her team do not believe her so she decides to do a hypothesis test at a 1% significance level. to Pursuit them she throws 14 pictures the main speed of the simple pictures is 58 mph knows from experience that the standard deviation of her pitch speed is 6 mph. what is the test statistic of this one mean hypothesis test round to two decimal places
5. Question: suppose that null hypothesis is Doctors believe that a surgical procedure is successful at least 80% of the time what is the type /error in this scenario?
6. Question: a politician claims that at least 68% of water sport or degrees in Texas a group of researchers are trying to show that this is not the case. identify the researchers’ null hypothesis and the alternative hypothesis in terms of the parameter p.
7. Question: which of the following result is a null hypothesis and alternative hypothesis
8. Question: Suppose hypothesis is the mean age of the on a ranch is 6 years what is the type or error in this scenario?
9. Question: which of the hypothesis test listed below is the left tailed test select all correct answers?
10. Question: identify the type of hypothesis test below.
11. Question: which of the following result is a null hypothesis and alternative hypothesis
12. Question: which of the following result is a null hypothesis and alternative hypothesis
13. Question: spools the null hypothesis is the mean age of the horses on the ranch is 6 year what is the type 2 error in this scenario?
14. Question: what was the null hypothesis is a weight lifting bar can withstand weights of 800 lb and less. what is the alpha the probability of a type 1 error in this scenario?
15. Question: determine the type 2 error if the null hypothesis is a wooden ladder can withstand weight of 250 pounds and less??
16. Question: suppose the null hypothesis is the sporting goods store claims that at least 70% of its customers do not shop at any other sporting good stores what is the type one error in this scenario?
17. Question: suppose the null hypothesis is a sporting good store claims that at least 70% of his customers do not show up at any other sporting good store what is the probability of type 2 error in this scenario
18. Question: a consumer protection company is testing a seat belt to see how much force it can hold the null hypothesis is that the seat belt can hold at least five thousand pounds of force. the alternative hypothesis is that the seat belt can hold less than 5,000 pounds of force what is the type 2 error in this scenario??
19. Question: what is betta the probability of type 2 error if the null hypothesis is an electrician claims that no more than 10% of homes in the city are not up to the current electric cords?
20. Question: determine the type 1 error if the null hypothesis is the percentage of homes in the city that are not up to the current electric code is no more than 10%. and the alternative hypothesis is the percentage of homes in the city that are not up to the current electric code is more than 10%?
21. Question: determine the type 1 error if the null hypothesis is, Carmen believe that her chemistry exam will only cover material from chapter 4 & 5 ?
22. Question: determine the type 1 error if the null hypothesis is researchers claim that 65% of college students will graduate with debt.?
23. Question: Suppose a Chef claim that her meatball weight is less than 3 oz on average several of her customer do not believe her so that she decides to do a hypothesis test at least 1% significance level to pursue them she cooks 25 meatballs the main weight of the sample meatball is 2 oz the chef knows from experience that the standard deviation for her meatball weight is 0.5 Oz. what is the test statistics of this one mean hypothesis test rounded to two decimal places?
24. Question: Jaime bowler claims that her bowling score is less than 168 points on average. several of her teammates do not believe her so she decided to do a hypothesis test at a 1% significance level 17 games the main score of the sample games is 155 points. Jamie knows from experience that the standard deviation of bowling score is 19 points and has reason to assume our scores are normally distributed. what is the test statistics of this one mean hypothesis test rounded to two decimal places
    

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MATH 225N Week 7 Assignment: Hypothesis Test for the Mean – Population Standard Deviation Known

1. Question: Suppose a chef claims that her meatball weight is less than 3 ounces, on average. Several of her customers do not believe her, so the chef decides to do a hypothesis test, at a 1%significance level, to persuade them.Shecooks25meatballs.Themean weight of the sample meatballs is 2 ounces. The chef knows from experience that the standard deviation for her meatball weight is 0.5ounces.
2. Question: A mechanic wants to show that more than 44%of car owners do not follow a normal maintenance schedule. Identify the null hypothesis, H₀, and the alternative hypothesis, H_a, in terms of the parameter p.
3. Question: Which graph below corresponds to the following hypothesis test?
4. Question: Jamie, a bowler, claims that her bowling score is less than 168 points, on average.
5. Question: Several of her teammates do not believe her, so she decides to do a hypothesis test, at a 1% significance level, to persuade them. She bowls 17 games. The mean score of the sample games is 155 points. Jamie knows from experience that the standard deviation for her bowling score is 19 points. What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?
6. Question: Which of the following results in a null hypothesis p≥0.44 and alternative hypothesis p<0.44?
7. Question: Which of the hypothesis tests listed below is a left-tailed test? Select all correct answers.
8. Question: Determine the Type I error if the null hypothesis, H₀, is: the percentage of homes in the city that are not up to the current electric codes is no more than10%. And, the alternative hypothesis, H_a, is: the percentage of homes in the city that are not up to the current electric codes is more than10%.
9. Question: What is α, the probability of a Type I error if the null hypothesis, H₀, is: Carmin believes that her chemistry exam will only cover material from chapters four and five.
10. Question: Which of the following results in a null hypothesis p≤0.69and alternative hypothesisp>0.69?
11. Question: Identify the type of hypothesis test H₀:X≥17.9, H_a:X<17.9
12. Question: Identify the type of hypothesis test H₀:X≤16.9, H_a:X>16.9
13. Question: Which of the following results in a null hypothesis μ≤7 andalternative hypothesisμ>7?
14. Question: Which of the hypothesis tests listed below is a two-tailed test? Select all correct answers.
15. Question: Suppose the null hypothesis, H₀, is: doctors believe that a surgical procedure is successful at least 80% of the time. What is the Type I error in this scenario?
16. Question: Suppose the null hypothesis, H₀, is: a sporting goods store claims that at least 70%of its customers do not shop at any other sporting goods stores. What is the Type I error in this scenario?
17. Question: Jolyn, a golfer, claims that her drive distance is not equal to 222 meters, on average. Several of her friends do not believe her, so she decides to do a hypothesis test, at a 5% significance level, to persuade them. She hits 11 drives. The mean distance of the sample drives is 218 meters. Jolyn knows from experience that the standard deviation for her drive distance is 14 meters. H₀: μ=222; H_a: μ≠222 α=0.05(significance level) What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?
18. Question: Suppose a chef claims that her meatball weight is not equal to 4 ounces, on average. Several of her customers do not believe her, so the chef decides to do a hypothesis test, at a 10% significance level, to persuade them. She cooks 13 meatballs. The mean weight of the sample meatballs is 3.9ounces. The chef knows from experience that the standard deviation for her meatball weight is 0.6 ounces. H₀: μ=4; H_a: μ≠4 α=0.1(significancelevel) What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?
19. Question: Lexie, a chef, claims that her meatball weight is more than 3 ounces, on average. Several of her customers do not believe her, so she decides to do a hypothesis test, at a1% significance level, to persuade them. She cooks 12 meat balls. The mean weight of the sample meatballs is 3.6 ounces. Lexie knows from experience that the standard deviation for her meatball weight is 0.5ounces. H₀: μ≤3; H_a: μ>3 α=0.01(significancelevel) What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?
20. Question: Gail, a baker, claims that her bread height is not equal to 14 cm, on average. Several of her customers do not believe her, so she decides to do a hypothesis test, at a 5% significance level, to persuade them. She bakes 15loaves of bread. The mean height of the sample loaves is 13.8cm. Gail knows from experience that the standard deviation for her bread height is 0.7 cm. H₀: μ=14; H_a: μ≠14 α=0.05(significancelevel) What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?
    

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MATH 225N Week 7 Assignment: Hypothesis Test for the Mean – Population Standard Deviation Known

1. Question: .Jamie, a bowler, claims that her bowling score is less than 168 points, on average. Several of her teammates do not believe her, so she decides to do a hypothesis test, at a 1% significance level, to persuade them. She bowls 17 The mean score of the sample games is 155 points. Jamie knows from experience that the standard deviation for her bowling score is 19 points.

• H0: μ≥168; Ha: μ<168
• α=0.01 (significance level)

What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?

2. Question: Which of the following results in a null hypothesis p≤61 and alternative hypothesis p>0.61?

3. Question: Lexie, a bowler, claims that her bowling score is more than 140 points, on average. Several of her teammates do not believe her, so she decides to do a hypothesis test, at a 5% significance level, to persuade them. She bowls 18 The mean score of the sample games is 155 points. Lexie knows from experience that the standard deviation for her bowling score is 17 points.

• H0: μ≤140; Ha: μ>140
• α=0.05 (significance level)

What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?

4. Question: Determine the Type II error if the null hypothesis, H0, is: a wooden ladder can withstand weights of 250 pounds and less.

5. Question: Which of the following results in a null hypothesis p=3 and alternative hypothesis p≠0.3?

6. Question: Determine the Type I error if the null hypothesis, H0, is: an electrician claims that no more than 10% of homes in the city are not up to the current electric codes.

7. Question: Which graph below corresponds to the following hypothesis test?
H0:μ≥9, Ha:μ<5.9

8. Question: Which graph below corresponds to the following hypothesis test?
H0:p≤1, Ha:p>8.1

9. Question: Suppose the null hypothesis, H0, is: a sporting goods store claims that at least 70% of its customers do not shop at any other sporting goods stores. What is the Type I error in this scenario?

10. Question: Determine the Type II error if the null hypothesis, H0, is: researchers claim that 65% of college students will graduate with debt.

11. Question: Which graph below corresponds to the following hypothesis test?
H0:μ≤9, Ha:μ>16.9

12. Question: Which of the hypothesis tests listed below is a left-tailed test? Select all correct answers.

13. Question: Determine the Type I error if the null hypothesis, H0, is: researchers claim that 65% of college students will graduate with debt.

14. Question: A consumer protection company is testing a seat belt to see how much force it can hold. The null hypothesis, H0, is that the seat belt can hold at least 5000 pounds of force. The alternative hypothesis, Ha, is that the seat belt can hold less than 5000 pounds of force.What is a Type II error in this scenario?

15. Question: Suppose the null hypothesis, H0, is: a sporting goods store claims that at least 70% of its customers do not shop at any other sporting goods stores. What is β, the probability of a Type II error in this scenario?

16. Question: Suppose the null hypothesis, H0, is: doctors believe that a surgical procedure is successful at least 80% of the time. Which of the following gives β, the probability of a Type II error?

17. Question: A car magazine claims that 68% of car owners follow a normal maintenance schedule. A mechanic does not think this is accurate, and so he wants to show that the percentage of people who follow a normal maintenance schedule is not equal to 68%….. Identify the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the parameter p.H0: p=0.68; Ha: p≠0.68

18. Question: Which of the following results in a null hypothesis p≤62 and alternative hypothesis p>0.62?

19. Question: Which of the following results in a null hypothesis μ≥31 and alternative hypothesis μ<31?

20. Question: Which of the following results in a null hypothesis μ≤7 and alternative hypothesis μ>7?

21. Question: Which of the following answers give valid null and alternative hypotheses for a hypothesis test?

22. Question: A mattress store advertises that their beds last at least 5 years, on average. A consumer group thinks that they do not last that long and wants to set up a hypothesis test….. If μ denotes the average time, in years, that the mattresses last, what are the null and alternative hypotheses in this situation?

23. Question: Which of the following results in a null hypothesis p≥44 and alternative hypothesis p<0.44?

24. Question: Which of the following results in a null hypothesis p≥44 and alternative hypothesis p<0.44?

25. Question: Suppose a pitcher claims that her pitch speed is not equal to 45 miles per hour, on average. Several of her teammates do not believe her, so the pitcher decides to do a hypothesis test, at a 1% significance level, to persuade them. She throws 21 The mean speed of the sample pitches is 46 miles per hour. The pitcher knows from experience that the standard deviation for her pitch speed is 6 miles per hour.

• H0: μ=45; Ha: μ≠45
• α=0.01 (significance level)

What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?

26. Question: Suppose a bowler claims that her bowling score is less than 116 points, on average. Several of her teammates do not believe her, so the bowler decides to do a hypothesis test, at a 5% significance level, to persuade them. She bowls 25 The mean score of the sample games is 103 points. The bowler knows from experience that the standard deviation for her bowling score is 19 points.

H0: μ≥116; Ha: μ<116

α=0.05 (significance level)

What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?

27. Question: Suppose the null hypothesis, H0, is: the mean age of the horses on a ranch is 6 What is the Type II error in this scenario?

28. Question: Suppose the null hypothesis, H0, is: a weightlifting bar can withstand weights of 800 pounds and less. What is the Type I error in this scenario?

29. Question: Suppose the null hypothesis, H0, is: doctors believe that a surgical procedure is successful at least 80% of the time. What is the Type I error in this scenario?

30. Question: A consumer protection company is testing a towel rack to see how much force it can hold. The null hypothesis, H0, is that the rack can hold at least 100 pounds of force. The alternative hypothesis, Ha, is that the rack can hold less than 100 pounds of force.What is a Type I error in this scenario?

31. Question: What is β, the probability of a Type II error if the null hypothesis, H0, is: an electrician claims that no more than 10% of homes in the city are not up to the current electric codes. the probability that the electrician thinks that no more than 10% of homes in the city are not up to the current electrical codes when, in fact, more than 10% of the homes are not up to the current electric codes

32. Question: Determine the Type I error if the null hypothesis, H0, is: Carmin believes that her chemistry exam will only cover material from chapters four and five.