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Identify the symmetrical interval that includes? 95% of the sample means for a population with a...

Identify the symmetrical interval that includes? 95% of the sample means for a population with a mean equal to 52 and a standard deviation equal to 14 using a sample size of 49.

What is the lower bound and upper bound of this interval?

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Answer #1

95% confidence level value of Z = 1.96

Confdence interval =

X = 52

= 14

n = 49

Confdence interval =

Confdence interval = 52 3.84

Upper bound interval = 52 + 3.84 = 55.84

Lower bound interval = 52 - 3.84 = 48.16

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