A sample of 27 independent observations is taken from a normal distribution of unknown mean μ but...

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A sample of 27 independent observations is taken from a normal distribution of unknown mean μ but known variance σ. 75.24. Th

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Answer 1

Answer #1

SE = $\sigma$ / $\sqrt{n}$

= V 75.24 / $V27$ = 1.6693

$\alpha$ = 0.02

ndf = 27 - 1 = 26

From Table, critical values of t = $\pm$ 2.4786

So,

Width of the confidence interval:

2.4786 X 1.6693 X 2 = 8.2752

So,

Answer is:

8.2752

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Answer 2

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