How many degrees of freedom should they use

Reference no: EM133650993

Question: Suppose that Lorna studied for the Graduate Management Admission Test (GMAT) using a well-known preparation class and earni was thrilled to receive a total score of 760. Her friend Eric, however, thinks she would have scored just as well without the class. To test the efficacy of the class, they obtain a small but random sample of 15 test results from other students using the same E class. This sample's average is 567.23 with a standard deviation of 182.05. In comparison, the national average was 550.12. Assume the population's results are normally distributed but that its standard deviation is not known. Lorna and Eric decide to perform a two-tailed T test at a significance level of a = 0.05. How many degrees of freedom should they use in their calculations?

Reference no: EM133650993

Questions Cloud

A computer chess game and a human chess champion : A computer chess game and a human chess champion are evenly matched they plan fourteen games, probability they each win 7 times

How did patient hm perform over multiple trials compared : The mirror tracing task is one where participants trace an image while looking in the mirror. How did patient HM perform over multiple trials compared to normal

How many students should the teachers put into each group : They would like to have the same size groups in both classes and they would like the groups to be as large as possible. How many students should the teachers

Explain whether the healthcare organization work is grounded : Post a description of healthcare organization website you reviewed. Explain whether this healthcare organization's work is grounded in EBP and why or why not.

How many degrees of freedom should they use : perform a two-tailed T test at a significance level of a = 0.05. How many degrees of freedom should they use in their calculations

How does us racial hierarchy factor into this segregation : How might we interpret the experiences of white populations in these two cities? How does the U.S. racial hierarchy factor into this segregation?

Discuss the specific impact of the disease on children : Discuss the specific impact of the disease on children including potential complications, long-term effects, and any unique considerations in pediatric cases.

Compute the probability of price : Compute the z score for x = 400,000. Look up the probability of the z score in the table. Check the location of the z score in the probability curve

What is the war zone mentality and the urban soldier : How does race, class, and culture intertwine? What is the "war zone mentality" and the "urban soldier"? How does this relate to the culture of honor?

User Account

All Pages