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Listed below are the amounts of net worth (in millions of dollars ) Of the ten...

Listed below are the amounts of net worth (in millions of dollars ) Of the ten wealthiest celebrites in the counrty. Construct a 95% Confidence interval.

265, 213, 195, 165, 164, 152, 146, 146, 146, 141

Math   Statistics-And-Probability   
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Answer #1

From the given samplem

Sample mean = = 173.3

Standard deviation S = 39.9223

t critical value at 0.05 significance level at 9 df = 2.262

95% confidence interval for is

- t * S / sqrt(n) < < + t * S / sqrt(n)

173.3 - 2.262 * 39.9223 / sqrt(10) < < 173.3 + 2.262 * 39.9223 / sqrt(10)

144.743 < < 201.857

95% CI is (144.743 , 201.857)

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