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-This scatterplot shows the relationship between neck measurement (cm) and weight (lb) for 252 men. The linear correlation coefficient r is 0.83.
-If we change the weights from pounds into kilograms, what is the effect on the correlation?
-If a man is removed from the data set, the correlation decreases only slightly from 0.83 to 0.81. Why do you think the change in the correlation is so small?
a) What is the probability that a randomly selected pregnancy lasts less than 161 ?days?
Find the population regression line. Round to three decimal places. Use the format as an example when submitting your equation 456.123 + 789.123x.
If the test is to be carried out at α = 0.05, what will be the power of the test if the true percentage of female top executives is 4%?
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Find the standard deviation and variance from the (population) data below. Describe your results.
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