A researcher is testing a null hypothesis that states: Ho: = 50. A sample of 25 scores is selected and the mean is M = 55.
Assuming that the sample variance is 400, compute the estimated standard error and the t statistic. Is this sample sufficient to reject the null hypothesis using a two-tailed test with alpha = .05?
Explain how increasing variance affects the standard error and the likelihood of rejecting the null hypothesis.© BrainMass Inc. brainmass.com December 20, 2018, 9:53 am ad1c9bdddf
With alpha = 0.05 and degree of freedom=n-1=25-1=24 and also a two-sided test, the t-statistic=2.064 by t table.
So if the sample variance is 100, then the estimated ...
An explanation of how increasing variance affects the standard error and the likelihood of rejecting the null hypothesis.