Question

Increasing the confidence-interval level from .95 to .99 a. increases the likelihood of including the population...

Increasing the confidence-interval level from .95 to .99

a.

increases the likelihood of including the population mean within its limits
b.

decreases the likelihood of including the population mean within its limits
c.

increases the number of degrees of freedom
d.

none of these, since a confidence interval may never include the true population mean
Math   Statistics-And-Probability   
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Answer #1

Increasing the confidence-interval level from .95 to .99

Answer: a.

a.

increases the likelihood of including the population mean within its limits

Explanation:

If we increase the confidence level of the interval by assuming all other factors constant, the width of the confidence interval also increases. This means, there is a more chance of population mean being included in the interval. This means, the likelihood of including population mean increases due to increment in confidence level.

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