Question

Associate professor of a particular subject claims that the grades on last semester were little bit closer together than they had been in the past. To test the claim stated by associate professor if this claim is true, he looks at a sample of 8 exams from last semester 42, 41, 45, 49, 43, 40, 47, 41. Prior studies states that, the variance of exam scores was 4.652. what is the appropriate value of the test statistics to examine the claim stated by associate professor?

Name: associate professor of a particular subject claims that the grades on last semester were little bit closer together than they had been in the past to test the claim stated by associate professor if 2
Uploaded: 2022-06-25T17:45:36-08:00
Duration: 1 min 36 s
Channel: Kari Hasz
Description: associate professor of a particular subject claims that the grades on last semester were little bit closer together than they had been in the past to test the claim stated by associate professor if 2

          Associate professor of a particular subject claims that the grades on last semester were little bit closer together than they had been in the past. To test the claim stated by associate professor if this claim is true, he looks at a sample of 8 exams from last semester 42, 41, 45, 49, 43, 40, 47, 41. Prior studies states that, the variance of exam scores was 4.652. what is the appropriate value of the test statistics to examine the claim stated by associate professor?

Added by Raam S.

Finite Mathematics and Calculus with Applications

Margaret L. Lial, Raymond N. Greenwell,… 9th Edition

Instant Answer

Solved by Expert Kari Hasz

06/25/2022

Step 1

Given exam scores: 42, 41, 45, 49, 43, 40, 47, 41 Mean (\( \bar{x} \)) = (42+41+45+49+43+40+47+41) / 8 = 43.25 \( s^2 = \frac{(42-43.25)^2 + (41-43.25)^2 + (45-43.25)^2 + (49-43.25)^2 + (43-43.25)^2 + (40-43.25)^2 + (47-43.25)^2 + (41-43.25)^2}{8-1} \) \( s^2 = Show more…

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Associate professor of a particular subject claims that the grades on last semester were little bit closer together than they had been in the past. To test the claim stated by associate professor if this claim is true, he looks at a sample of 8 exams from last semester 42, 41, 45, 49, 43, 40, 47, 41. Prior studies states that, the variance of exam scores was 4.652. what is the appropriate value of the test statistics to examine the claim stated by associate professor?