Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Assume a researcher found that the correlation between a test she had developed and exam performance was .5 in a study of 25 students. She

Assume a researcher found that the correlation between a test she had developed and exam performance was .5 in a study of 25 students. She had previously been informed that correlations under .30 are considered unacceptable. The 95% confidence interval was [0.131, 0.747]. Can you be confident that the true correlation is at least 0.30?

A.

Yes, you can, because the correlation coefficient is .5 (which is above .30) and falls within the boundaries of the confidence interval.

B.

No, you cannot, because the lower boundary of the confidence interval is .131, which is less than .30, and so the true correlation could be less than .30.

C.

Yes, you can, because the upper boundary of the confidence interval is above .30 we can be 95% confident that the true correlation will be above .30

D.

No, you cannot, because the sample size was too small.

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access with AI-Powered Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Entrepreneurship

Authors: Andrew Zacharakis, William D Bygrave

5th Edition

1119563097, 9781119563099

Students also viewed these Mathematics questions