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Test whether there is significant difference in the test anxiety level of the three groups using nonparametric test.
College freshmen with high test anxiety are assigned to three groups. One group receives free individualized counseling, one group participates in a class to teach them how to reduce their anxiety, and the third group receives no treatment. They are tested to determine if there is a significant difference in the test anxiety level of the three groups in a test situation.
Scores on certain nationwide college entrance examination follow normal distribution with mean of 500 and a standard deviation of 100. Determine the probability that student will score?
At.01 significance level, is there difference in mean number of times men and women order take-out dinners in month? Determine the p -value?
The nation health department has concerns with the chlorine level of 0.4% mg/mL at a local water park raises to unsafe level.
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
This model is fit to the data using the method of least squares using statistical software, and the following ANOVA table is obtained
Using Sally's estimate of demand that follows, how many T-shirts should she produce for the upcoming event?
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
Draw the graph of the regression line on the same plot as the scatter diagram above.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
Given this information, what would sampling error be if sample including seven values in top row were used to calculate sample mean?
Assume that you have a binomial experiment with p = 0.5 and a sample size of 100. The expected value of this distribution is.
What does the standard deviation mean? Interpret the standard deviation relative to the average or mean?
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