Question

H0: µ ≥ 25 vs. Ha:µ < 25; s = 2, n = 20; α =...

H0: µ ≥ 25 vs. Ha:µ < 25; s = 2, n = 20; α = 1%

What will be the critical value for testing this hypothesis?

Select one:

a. t* = 2.539

b. t* = 2.861

c. Z* = 2.33

d. t* = -2.539

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Homework Answers

Answer #1

Answer : (option d)

EXPLANTION

since sample size (n) is less than 30 we use t-distribution to obatain critical value

n = 20

critical value

  

   ----------------------------from t table

since alternative hypothesis Ha:µ < 25 is a left tail test therefore critical value is -2.539

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