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Ilia_Sergeevich [38]

3 years ago

14

A 95% confidence interval for a population mean is determined to be 100 to 120. if the confidence coefficient is reduced to 0.90

, the interval for μ

1 answer:

Lerok [7]3 years ago

4 0

For 95% CI
x - 0.05s = 100
x + 0.05s = 120
Solve for x and s

The interval for u with 90% is
x - 0.10s
and
x + 0.10s
Substitute x and s

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