Chapter 9, Problem 16P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

Weinstein, McDermott, and Roediger (2010) report that students who were given questions to be answered while studying new material had better scores when tested on the material compared to students who were simply given an opportunity to reread the material. In a similar study, a group of students from a large psychology class were given questions to be answered while studying for the final exam. The overall average for the exam was μ = 73.4 but the *n* = 16 students who answered questions had a mean of *M* = 78.3 with a standard deviation s = 8.4. Use a two-tailed test with α = .01 to determine whether answering questions while studying produced significantly higher exam scores.

To determine

**To Find:** Whether answering questions while studying produced significantly higher scores using a one-tailed test with

Explanation

**Given info:**

A sample of 16 students is selected from a population with mean 73.4. The sample mean, and standard deviation (s) is found to be 78.3 and 8.4 respectively. One-tailed hypothesis test using

**Calculations:**

Step 1: Null Hypothesis is

Step 2: For a sample of

Step 3: t-statistics can be calculated using formula:

Calculate

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