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A sample of n=9 individuals is selected from a population with a mean of μ=10.  A researcher suspects that after the individuals have gone through a specific type of  treatment, their performances on a standardized examination will be different from the  general population. After the treatment, the sample has a M=13 and s2=9. a. Using symbols, state the hypothesis for a two-tailed test. b. Calculate the t statistic and place this on a standardized normal distribution. c. With a two-tail α=0.05, state the conclusion of these findings.

A sample of n=9 individuals is selected from a population with a mean of μ=10.  A researcher suspects that after the individuals have gone through a specific type of  treatment, their performances on a standardized examination will be different from the  general population. After the treatment, the sample has a M=13 and s2=9. a. Using symbols, state the hypothesis for a two-tailed test. b. Calculate the t statistic and place this on a standardized normal distribution. c. With a two-tail α=0.05, state the conclusion of these findings.

MATLAB: An Introduction with Applications
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 sample of n=9 individuals is selected from a population with a mean of μ=10. 
A researcher suspects that after the individuals have gone through a specific type of 
treatment, their performances on a standardized examination will be different from the 
general population. After the treatment, the sample has a M=13 and s2=9.
a. Using symbols, state the hypothesis for a two-tailed test.
b. Calculate the t statistic and place this on a standardized normal distribution.
c. With a two-tail α=0.05, state the conclusion of these findings.
d. Calculate the estimated d and state the effect size (i.e., small, medium, large)

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