A random sample was selected from a population having a normal distribution. Calculate a 90%

confidence interval estimate for m for each of the following situations:

a. x = 134, n = 10, s = 3.1

b. x = 3,744, n = 120, s = 8.2

c. x = 40.5, n = 9, s = 2.9

d. x = 585.9, x2 = 15,472.37, n = 27

(Hint: Refer to Equation 3.13.)

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