Question

Question 8 1 pts Suppose we are conducting a hypothesis test to see if the average number of M&Ms one person can eat before getting sick has decreased. We calculate our test statistic on the z-table to be -1.75. Do we reject or fail to reject Ho ata = .05? O Fail to reject; the average does not seem to have fallen O Reject; the average seems to have fallen O Reject: the average does not seem to have fallen O Not enough information to answer

Answer 1

Solution:

Question 6)

Answer : normal distribution

(when the population standard deviation is known , then we use normal distribution)

Question 7)

p value is

mus be number between 0 and 1

(Because p value is a probability)

Question 8)

Here , left tailed test.

So critical value is $-z_{\alpha}$ i.e. -z_0.05 i.e. -1.645

Rejection region is < $-z_{\alpha}$ i.e < -1.645

Test statistic z = -1.75 < -1.645

So , reject

Answer : Reject , average seems to have fallen.