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Name: A researcher obtains a sample of n= 25 adults who are between the ages
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Description: A researcher obtains a sample of n= 25 adults who are between the ages of 65 and 75. The researcher measures cognitive performance for each individual before and after a two-month program in which participants receive daily doses of a blueberry suppl

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 researcher obtains a sample of n= 25 adults who are between the ages of 65 and 75. The researcher measures cognitive performance for each individual before and after a two-month program in which participants receive daily doses of a blueberry supplement. The results show an average increase in performance of M_D= 8, with SS = 1200.

Does the result support the conclusion that the blueberry supplement significantly increase cognitive performance? Use a one-tailed test with α = .01

Construct a 95% confidence interval to estimate the average cognitive performance improvement for the population of older adults.

The lower boundary is

The upper boundary of the confidence interval you constructed in the previous question is

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