A (1 - a)100% confidence interval of the population mean is X ± 2.41 The confidence level (1 - a)100% is O a. 99% b. 98.4% OC. 21.7% O d. 95%

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100%
A (1 a)100% confidence interval of the population mean is X 2.41
The confidence level (1 – a)100% is
O a. 99%
b. 98.4%
Oc 21.7%
d. 95%
The correct answer is:
98.4%
In sampling from a normal distribution with variance 25, how large must sample
interval for the mean is 1.96?
Transcribed Image Text:A (1 a)100% confidence interval of the population mean is X 2.41 The confidence level (1 – a)100% is O a. 99% b. 98.4% Oc 21.7% d. 95% The correct answer is: 98.4% In sampling from a normal distribution with variance 25, how large must sample interval for the mean is 1.96?
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