1.A biologist knows that, under normal conditions, the average length of a leaf of acertain full-grown plant is 4 inches, with the standard deviation of 0.6 inches. A sampleof 45 leaves from the plants that were given a new type of plant food had an averagelength of 4.2 inches. Is there reason to believe that the new plant food is responsible fora change in the average growth of leaves? Use a = 0.02. Also, compute 95% confidenceinterval for the average length of a leaf.

1. The sample size is 45, sample mean is 4.2, population mean is 4, and population standard…

Answered: biologist knows that, under normal…

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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An SRS of 29 students at HCC gave an average height of 5.5 feet and a standard deviation of .1 feet. Construct a 90% confidence interval for the mean height of students at HCC.
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A simple random sample of 95 basketball players is taken from different teams and their mean weight is found to be 226 pounds and the standard deviation of the population is 20 pounds. Using 0.05 level of significance , test the claim that the average weight for all basketball players is 231 pounds.
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Wildlife conservationists studying grizzly bears in the United States found that the mean weight of 27 adult males was 623 pounds with a standard deviation of 88 pounds. Construct a 90% confidence interval for the mean weight of all adult male grizzly bears in the United States. Assume that the weights of all adult male grizzly bears in the United States are normally distributed. Round to the nearest whole number.
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