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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.
If the company does not want to replace more than 5% of the televisions?
Find a 99% confidence interval for the population mean number of weekly miles.
Obtain a test statistic and p-value. Interpret the results at = .01.
You are told that twenty-five percent of the player names in the hat are quarterbacks and that forty percent of the players in the hat have Porsches in their garage at home. What is the likelihood that you will get to go to lunch with a quarterbac..
Determine marginal probability distributions of X and Y . Compute conditional probability P ( Y = 2 | X = 1)
You read a report that says, "On the basis of the simple random sample of 100 high school seniors that took the SATM test this year, a confidence interval for µ is found to be 512.00 ± 25.76." What was the confidence level used to calculate this..
What is the estimated standard error of the sample mean? Construct a 95 percent confidence interval for the population mean category fluency test score.
If all samples of size 64 are drawn, mean of sample according to Central Limit Theorem is 100.
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.
Find probability using normal distribution.Using N (1152, 84), the Normal model for weight of Angus steers, what percent of steers weigh.
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
Using the following number of flirtations actions in the 4 hour period, test the "null hypothesis'
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