SOLUTION: 8. A sample of 65 observations is selected from one population. The sample mean is 2.67 and the sample standard deviation is .75. A sample of 50 observations is selected from a sec
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Question 482093: 8. A sample of 65 observations is selected from one population. The sample mean is 2.67 and the sample standard deviation is .75. A sample of 50 observations is selected from a second population. The sample mean is 2.59 and the sample standard deviation is .66. Conduct the following test using 95% level of confidence. Z-test for Unpaired data
a. Is it a 1 or 2 tail test
b. Compute the statistical calculation
c. What is your decision regarding H1
d. What is the P-value
You can put this solution on YOUR website! A sample of 65 observations is selected from one population. The sample mean is 2.67 and the sample standard deviation is .75. A sample of 50 observations is selected from a second population. The sample mean is 2.59 and the sample standard deviation is .66. Conduct the following test using 95% level of confidence. Z-test for Unpaired data
a. Is it a 1 or 2 tail test::: 2 tail
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b. Compute the statistical calculation
Ho: u1-u2 = 0
H1: u1-u2 is not 0
critical value: +/-1.96
test statistic: z = (2.67-2.59)/sqrt[(0.75^2/65)+(0.66^2/50)] = 0.6071
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c. What is your decision regarding H1: fail to reject Ho; reject H1
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d. What is the P-value
p-value = 2*normalcdf(0.6071,100) = 0.5438
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Cheers,
Stan H.
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