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When coaching or training athletes, the tests employed to predict performance or determine training methods incorporate statistical methods. Why are these methods so effective?
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.50 inches.
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
Pilot sample of n = 50 tires illustrated sample standard deviation equal to 4,000 miles. Based on this information, required sample size is?
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
Determine the mean and standard deviation of this distribution?
Perform the appropriate test for a difference in mean blood glucose and report the p-value for the two-tailed test of significance, assuming that the variances are equal.
Should the finite-population correction factor be used? Why or why not?
You have been asked to study the effects of an employee-wide training program, in a company of 500 employees, designed to reduce the amount of customer complaints.
Plot the data on the same line and give your impression regarding any apparent differences between the two companies.
If a null hypothesis is rejected at a significance level of .01, it will ______ be rejected at a significance level of .05
Find the critical value for t and determine the null and alternate hypothesis.
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49.
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