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Find simulated data for a normally distributed variable Z ~ N (µ, 1). In groups 1 to 6 µ = 0, while in group 7 µ = 0.5.
1. With this important detail, are there any significant differences with LSD?
2. Is the F-test significant?
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Investigate the cost of a home mortgage and to determine the monthly payment.
At α = .05, is there a difference in variances? Illustrate all steps clearly, including the illustration of the decision rule.
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
It is better to use the median rather than the mean for a distribution when:
Using the confidence interval when conducting a two-tail test for the population mean we do not reject the null hypothesis if the hypothesized value for:
What is the expected value and variance for the number of contacts in eight attempts?
I have computed an analysis of variance for three groups with 10 observations per group. Evaluate the degrees of freedom for the F test
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
At the 0.05 level of significance, can we conclude Middletown students remained in their districts less time than Brockton students? Make use of 5-step hypothesis testing procedure.
For a t distribution with 16 degrees of freedom, find the area, or probability, in each region.
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