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Strack, Martin, and Stepper (1988) found that people rated cartoons as funnier when holding a pen in their teeth (which forced them to smile) than when holding a pen in their lips (which forced them to frown). For this study, identify the independent variable and the dependent variable.
Make a decision using the p-value approach at the given α = 0.05.
In a bumper test, three types of autos were deliberately crashed into a barrier at 5mph, and resulting damage was estimated. five test vehicles of each type were crashed.
Find out 90% confidence interval for the population average µ of the percentage of hospitals providing at least some charity care.
Use relative frequencies to estimate the probability that a seed will germinate, What is your estimate?
(a) Compute the arithmetic mean of the subscribers' incomes. (b) Compute the modal and median incomes.
If level of significance ( α ) is 0.005 in two-tail test, how large is non rejection region under curve of the t distribution?
Assume we have set of blood pressure with a mean of 80 Diastolic, and a sample standard deviation of 10 points. If we assume a normal distribution of Diastolic blood pressures,
Randomly select a sample of five rental agencies. Start with row two and column two. The number is 90935. Use the first two numbers starting with 90.
Given the following data, use exponential smoothing with a=0.2 and a=0.5 to generate forecasts for periods 2 through 6. Use MAD and MSE to decide which of the two models produced a better forecast.
History suggests that the average number of hurricanes formed during a year is 6.0 hurricanes. Find the probability of at most three hurricanes being formed during a randomly selected year.
Twelve case of leukemia are reported in people living in a particular census tract over a five year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cance-incidence rates?
What are the differences between regression and correlation analysis? What is correlation? Does correlation prove causation? Why or why not? Explain and provide examples to support your explanation.
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