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The Admissions officer for the graduate programs at the University of Pennsylvania believes that the average score on the LSAT exam at his university is significantly higher than the national average of 1,300. An accepted standard deviation for LSAT scores is 125. A random sample of 25 scores had an average of 1,375. Assume a significance level of 0.05.
State the appropriate null and alternative hypotheses.
Calculate the p-value to test the hypotheses.
What is your conclusion (use two parts: first, reject/do not reject; second, the explanation)?
Calculate the probability of Type II error when the actual population mean is 1350
Calculate the power of the test.
As part of this trial, they want to find out whether there is a difference between effectiveness for women and for men. At = .05, what is the test value?
She is interested in testing the null hypothesis that the mean SAT score is the same for each type of schooling using the one-way ANOVA. Some summary statistics for the three groups are given below, followed by the one-way ANOVA table.
What is the probability that a cereal would both high calorie and high fiber? In other words, what is P (high calorie and high fiber)?
Determine the confidence interval for population mean and the Superintendent wants to determine the average amount of hours per week the student population studies at home.
The following data provided by a coffee company are the roast time in minutes for five batches of coffee (x) and the resulting shrinkage in percent of the coffee weight(y).
Write the linear regression equation to forecast father's education from mother's education?
For the following scores, find the: A. Mean. B Median. C. Sum of squared deviation. D. Variance. E. Standard deviation.
Use this information to set up a 90 percent confidence interval for the proportion, p of all US workers who play hooky.
Regression equation to predict the dependent variable using multiple regression analysis:
Assume the arrival of these emails i3 approximated by the Poisson distribution.
What is the probability that a randomly selected fertilized egg hatches in less than 19 days? (Round to four decimal places as needed).
Find a 99% confidence interval estimate of the proportion of people who say that they voted.
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