Test the claim that the mean waiting time for the elevators onthe Dubois Library is 2.7 minutes using data collected from 150patrons, assuming that the true population standard deviation is0.8 minutes.
Given two data sets of size n= 13 and n=10, consisting ofmeasurements of heights from two separate populations, find theinterval estimate of the difference between the mean heights forthe populations.
The incidence of stroke for 400 smokers taking a new form of adrug was 2.5% (10 out of the 400) and the incidence of stroke for600 non-smokers was 1.5% (9 out of the 600). Test to see whetherthe difference in risks is significant.
Solution With a sample proportion of 54 and a sample size of 350 test the claim that a majority of students favor a trimester system Answer 1PropZTest Explanation We have to compare the sample proportion with the hypothetical population proportion therefore the appropriate function is 1PropZTest Test
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