Homework SourseQuestion 1 Select one answer 10 points Food inspectors inspe
Question 1
Select one answer.
10 points
Food inspectors inspect samples of food products to see if they are safe. This can be thought of as a hypothesis test with the following hypotheses.
H0: the food is safe
Ha: the food is not safe
The following is an example of what type of error?
The sample suggests that the food is safe, but it actually is not safe.
type I
type II
not an error
Question 2
Select one answer.
10 points
Food inspectors inspect samples of food products to see if they are safe. This can be thought of as a hypothesis test with the following hypotheses.
H0: the food is safe
Ha: the food is not safe
The following is an example of what type of error?
The sample suggests that the food is not safe, but it actually is safe.
type I
type II
not an error
Question 3
Select one answer.
10 points
A manufacturer of rechargeable laptop batteries markets its batteries as having, on average, 500 charges. A consumer group decides to test this claim by assessing the number of times 30 of their laptop batteries can be recharged and finds the average is 497, with a standard deviation of 10.
The resulting p-value is .1111; thus, the null hypothesis is not rejected. The consumer group concludes that the manufacturer
Solution
1 Type II
2 Type II
3 Type II The consumer group failed to reject the null hypothesis. An error would occur if in reality the null hypothesis were really false, and that the manufacturer\'s claim is incorrect. In this situation, a Type II error is possible.
4 Type I . Here, the null hypothesis is rejected. An error would occur if in reality the null hypothesis was true, and that there was no decrease in the proportion of people who have paid leave. In this situation, a Type I error is possible.
