A study of 95 apple trees showed that the average number of apples per tree was 525 The standard deviation of the population is 200. Which of the following is the 80%
Confidence interval for the mean number of apples per tree for all trees?
A) $ 495

Question

A study of 95 apple trees showed that the average number of apples per tree was 525 The standard deviation of the population is 200. Which of the following is the 80%
Confidence interval for the mean number of apples per tree for all trees? 
A) $ 495<\mu<555 $
B) $ 505<\mu<545 $
C) $ 499<\mu<551 $
D) $ 512<\mu< $

Quizplus · Accepted Answer

The 80% confidence interval is calculated using the formula: $\bar{x} \pm z \times \frac{\sigma}{\sqrt{n}}$. Here, $\bar{x} = 525$, $\sigma = 200$, $n = 95$, and the z-value for 80% confidence is approximately 1.28. Calculating gives the interval $499 < \mu < 551$.

A Study of 95 Apple Trees Showed That the Average 495<μ<555 495<\mu<555 495<μ<555

A Study of 95 Apple Trees Showed That the Average $495<\mu<555$