A Company That Sells an Online Course Aimed at Helping

question 92

Multiple Choice

A company that sells an online course aimed at helping high-school students improve their SAT scores has claimed that SAT scores will improve by more than 90 points on average if students successfully complete the course. To test this, a national school counseling organization plans to select a random sample of n = 100 students who have previously taken the SAT test. These students will take the company's course and then retake the SAT test. Assuming that the population standard deviation for improvement in test scores is thought to be 30 points and the level of significance for the hypothesis test is 0.05, what is the probability that the counseling organization will incorrectly "accept" the null hypothesis when, in fact, the true mean increase is actually 95 points?

• A) Approximately 0.508
• B) About 0.492
• C) Approximately 0.008
• D) Can't be determined without knowing the sample results.

---

Definitions:

Large Knowledge Base

A comprehensive collection of information, facts, and rules used in decision-making processes or computational systems.

Essential Structure

The fundamental or intrinsic architecture of an entity or concept, which determines its nature and characteristics.

Parallelogram

A parallelogram is a four-sided polygon with opposite sides that are parallel and equal in length, and opposite angles that are equal.

Rote Memorization

A learning technique that involves repeating information over and over to get it ingrained in memory without understanding the meaning.