MATH 2225N WEEK 7 UPDATED EXAM WITH VERIFIED Q&A-
CHAMBERLAIN
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 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.
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≤0.61 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 games. 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=0.3 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≥5.9, Ha:μ<5.9
8. Question: Which graph below corresponds to the following hypothesis test?
H0:p≤8.1, 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≤16.9, 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
/
CHAMBERLAIN
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 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.
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≤0.61 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 games. 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=0.3 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≥5.9, Ha:μ<5.9
8. Question: Which graph below corresponds to the following hypothesis test?
H0:p≤8.1, 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≤16.9, 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
/
