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In the context of hypothesis testing regarding one mean, the test (Z or t) may be statistically significant at the 5% level, but not significant in a practical sense at all. Illustrate the meaning of this statement by citing 3 examples from any area of interest.
The height in inches of girls on a high school girls basketball team are as follows: Identify the z score used in a quantile plot for the player with a height of 66.5 inches.
Give a probability distribution for the following: In 1992, the Big 10 collegiate sports conference moved to have women compose at least 40% of its athletes within 5 years.
Iindicate all samples are approximately Normal with no outliers. Is the ANOVA appropriate?
The following data on annual rates of return were collected from five stocks listed on the New York Stock Exchange ("the big board") and five stocks listed on NASDAQ.
The National Turkey Association wants to experiment with three different feed mixtures for very young turkeys. Since no experience exists regarding the three mixtures, no assumptions can be made about the distribution of weights.
At.05 significance level, is there a difference in mean number of calls per day between 2 employees? Compute the p -value?
The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators observed a random sample of 117 female Hispanic drivers in Boston; 68 of these drivers were wearin..
A state meat inspector in lowa has been given the assignment of estimating the mean net weight of packages of ground chuck labeled " 3 pounds." Of course, he realizes that the weights cannot be precisely 3 pounds.
A University Counseling Clinic is interested in predicting the levels of depression from the number of social events attended per week by a sample of their clients. The data are below:
The 95% confidence interval is defined as ____. a) an interval such that we are 95% confident that the population value lies within the interval b) an interval such that the probability is 0.95 that the interval contains the population value
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is:
Scores of an aptitude test are normally distributed with a mean of 280 and a standard deviation of 30. Determine the percentage of samples of size 4 that have a mean score within 21 points of the population mean score of 280.
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