Asked by zahra
When making a statistical inference about the mean of a normally distributed population based on a sample drawn from that population, which of the following statements is correct, all else being equal?
The 68% confidence interval is wider than the 90% confidence interval.
The 90% confidence interval is narrower than the 95% confidence interval.
The 90% confidence interval is wider than the 99% confidence interval.
The 99% confidence interval is narrower than the 68% confidence interval.
The 68% confidence interval is wider than the 90% confidence interval.
The 90% confidence interval is narrower than the 95% confidence interval.
The 90% confidence interval is wider than the 99% confidence interval.
The 99% confidence interval is narrower than the 68% confidence interval.
Answers
Answered by
R_scott
the wider the interval, the higher the confidence
look at the extreme
... if the sample was the entire population
... you would be 100% confident that the mean matched the population
look at the extreme
... if the sample was the entire population
... you would be 100% confident that the mean matched the population
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