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To determine whether there is a positive association between the two variables.
A regional commuter airline selected a random sample of 25 flights and found that the correlation between the number of passengers and the total weight, in pounds, of luggage stored in the luggage compartment is 0.94. Using the .05 significance level, can we conclude that there is a positive association between the two variables?
Determine the estimated population mean?
What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Explain the results plot the original data and the fitted regression equations.
What is the maximum error of estimate for p ?
If you did not know anything about standard deviation of population from which sample was taken, find out the 95% confidence interval for mean test score.
Test the hypothesis that there is no difference in the mean scores of Exam 1 and Exam 2 against the alternative that the average is greater for the second exam.
Find out the regression variable that correlates best. Among which regression variable, carbon dioxide or methane correlates best with the earth's surface temperature.
Write down the advantages and disadvantages of using computer software for decision making.
The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?
State the hypotheses for a right-tailed test.
Elucidate this data use an appropriate statistical test to explain whether the population mean TV "on" time has declined in the past decade.
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