The upper limit of the 90% confidence interval for $\mu$ , given that n = 64, $\bar { x }$ = 70 and $\sigma$ = 20, is 65.89.

Question

Quizplus · Accepted Answer

The upper limit of the 90% confidence interval is calculated using the formula $\bar{x} + z \times \frac{\sigma}{\sqrt{n}}$. For a 90% confidence interval, the z-value is approximately 1.645. Thus, the upper limit is $70 + 1.645 \times \frac{20}{\sqrt{64}} = 74.11$.

The Upper Limit of the 90% Confidence Interval For μ\muμ , Given That N = 64

The Upper Limit of the 90% Confidence Interval For $\mu$ , Given That N = 64