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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.
Determine the critical path probability that project will be completed within?
To test is there any significant difference among two proportions. The Damon family owns a large grape vineyard in western New York along Lake Erie.
Construct a frequency distribution and construct a histogram for the following data and use seven intervals, starting with 30-39.
A new speed limit will be initiated such that approximately 10% of vehicles will be over the speed limit. What is the new speed limit based on this criterion? In what way do you think the actual distribution of speeds differs from a normal distribu..
Suppose the people have weights that are normally distributed with a mean of 164lb and a standard deviation of 30lb. Find the probability?
A review of voter registration records in a small town yielded the following table of the number of males and females registered as Democrat, Republican, or some other affiliation.
Find the probability of accepting a lot as a function of the actual fraction of defective chips. In particular, let the actual fraction of defective chips in a given lot equal any of 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.14, 0.16, 0.18. Then compu..
Assume that two samples are independent simple random samples selected from normally distributed populations. Use a 0.05 significance level to test the claim that male and female biology students speak the same mean number of words in a day.
Use population distribution to determine expected juror frequencies. Test researcher's claim at a = 0.01.
First step of analytical hierarchy process doesn't include?
A histogram of time spent eating & drinking each day is skewed right. Use this result to explain why a large sample size is needed to construct a confidence interval for the mean time spent eating & drinking each day.
To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
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