Exhibit 10

question 48

Multiple Choice

Exhibit 10.9.A tutor promises to improve GMAT scores of students by more than 50 points after three lessons.To see if this is true,the tutor takes a sample of 49 students' test scores after and before they received tutoring.The mean difference was 53 points better after tutoring,with a standard deviation of the difference equal to 12 points.Let denote the mean of the difference: score after tutoring minus score before tutoring. Refer to Exhibit 10.9.Assuming α = 0.05,which of the following is the appropriate critical value?

---

Definitions:

Budget

An itemized forecast of an entity’s income and expenses expected for a specific period, usually showing how much money it intends to earn, spend, and save.

Donations

Voluntary transfers of resources, such as money or goods, to individuals or organizations without the expectation of direct return or compensation.

Spending Variances

Differences between the budgeted or standard cost amounts and the actual costs incurred.

Favorable

A term used in financial analysis to describe a situation, condition, or variance that leads to a positive outcome or better-than-expected results.