Week 7 Assignment Hypothesis Test for the Mean-Populations Standard Deviation Known
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?
Math 225N Week 7 Assignment Hypothesis Test for the Mean-Populations Standard Deviation Known
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?
Question
Jamie, 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 a 5% significance level, to persuade them. She cooks 13 meatballs. The mean weight of the sample meatballs is 3.6 ounces. Jamie knows from experience that the standard deviation for her meatball weight is 0.5 ounces.
- H0: μ≤3; Ha: μ>3
- α=0.05(significance level)
What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places?
Provide your answer below:
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 games. 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?
Question
Which of the following results in a null hypothesis p≤0.61 and alternative hypothesis p>0.61?
Select the correct answer below:
Question
Which graph below corresponds to the following hypothesis test?
H0:μ≥5.9, Ha:μ<5.9
Question
Math 225N Week 7 Assignment Hypothesis Test for the Mean-Populations Standard Deviation Known
Which of the following results in a null hypothesis p≥0.44 and alternative hypothesis p<0.44?
Question
Determine the Type II error if the null hypothesis, H0, is: a wooden ladder can withstand weights of 250 pounds and less.
Select the correct answer below:
You think the ladder can withstand weight of 250 pounds and less when, in fact, it cannot.
You think the ladder cannot withstand weight of 250 pounds and less when, in fact, it really can.
You think the ladder can withstand weight of 250 pounds and less when, in fact, it can.
You think the ladder cannot withstand weight of 250 pounds and less when, in fact, it cannot.
Question
Which graph below corresponds to the following hypothesis test?
H0:p≤8.1, Ha:p>8.1
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.
Select the correct answer below:
The electrician thinks that no more than 10% of homes in the city are not up to the current electrical codes when, in fact, there really are no more than 10% that are not up to the current electric codes.
The electrician thinks that more than 10% of the homes in the city are not up to the current electrical codes when, in fact, there really are more than 10% of the homes that do not meet the current electric codes.
The electrician thinks that more than 10% of the homes in the city are not up to the current electrical codes when, in fact, at most 10% of the homes in the city are not up to the current electric codes.
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.
Question
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