Reject the null hypothesis
To test the hypothesis that the normal population has mean 100, a random sample of size 10 is selected. If the sample mean is 110, will you reject the null hypothesis if the following is known?
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A press employed to make machinery produces 4% defective parts. The parts are manufactured in lots of 130. Let pˆ be proportion of defective parts. Determine the mean and standard deviation of the pˆ distribution.
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An upper-tailed two sample means test is to be conducted at .02 significance level. The populations standard deviations are unknown and can't be assumed equal. The degrees of freedom for the test statistic if n1 =10 and n2 =8 is:
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Determine the area under the normal curve that lies ot the left of the following z-balues.
A study was conducted to determine if there is difference, on average, in mean starting salaries of men and women graduating with degree in chemical engineering. A sample of 35 men who graduated with degree in chemical engineering from Barna Colle
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