Question: You are testing H 0 : = 100 against H a : < 100 based on an simple random sample of 25 observations from a

You are testing H0 : = 100 against Ha : < 100 based on an simple random sample of 25 observations from a Normally distributed population. The data give; = 98.32 and assume the population standard deviation is 4. The test statistic is

Group of answer choices

a. t=2.1

b. z=-2.1

c. z=2.1

d. t=-2.1

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