{ 46 ll 74% 08:45+27 71 632 208210 November, 23:27Confidence interval of single mean and proportionAn avocado farmer took a sample of 135 two-year old trees to procure information on theirgrowth rate. The sample produced a mean of 0.988 metres. It is known that the standarddeviation of the height of such trees is 0.028. Construct a 95% confidence interval for themean height of all such trees.n = 135* = 0.988g = 0.028SCREENCASTMATIC00:0012:38...

Answered: Confidence interval of single mean and…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A survey taken several years ago found that the average time a person reading a newspaper was 10.8mins. The standard deviation was 3mins. To see whether the average time changed since the newspapers format was revised, the editor survered 36 individuals. The average time the 36 people spent reading the paper was 12.2mins. At $=0.02, is there a change in the average time an individual spends reading the paper ? Find the 98% confidence interval of the mean.
The mean score of a class of 30 students in their math test is 6.267. The standard deviation is 1.9 and at 95% confidence, the class interval was found to be CI = (5.587, 6.947). If the passing score is 7.5, did the class passed the test?
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