A Sample of 40 Students Enroll in a Program That $\bar { x } = 17$

question 67

Multiple Choice

A sample of 40 students enroll in a program that claims to improve scores on the quantitative reasoning portion of the Graduate Record Examination (GRE) . The participants take a mock GRE test before the program begins and again at the end to measure their improvement.
The mean number of points improved was $\bar { x } = 17$ . Assume the standard deviation is $\sigma = 65$ and let $\mu$ be the population mean number of points improved. To determine whether the program is effective, a test is made of the hypotheses $H _ { 0 } : \mu = 0$ versus $H _ { 1 } : \mu > 0 .$
Compute the $P$ -value.

• A) \(1.6541\)
• B) \(0.0246\)
• C) \(0.0123\)
• D) \(0.0491\)

---

Definitions:

Entry

The act of entering or joining a particular market or area of business, often considered in terms of barriers that might exist to hinder new competitors.

Input Prices

Input prices refer to the costs associated with the purchase of the raw materials, labor, and other inputs required for the production of goods or services.

Marginal Cost Curve

A visual diagram indicating the variation in the expense of manufacturing an additional unit of a product as its production levels rise.

AVC

Stands for Average Variable Cost, which is the total variable cost per unit of output.