Quality ratings of a new line of take-home refrigerated entrées were obtained from three randomly formed groups of customers who were exposed to different types of advertisements about the product.One group,with 55 customers,saw ads that were designed to undermine their expected positive association of quality with advertisements;a second group of 36 customers saw ads that were designed to affirm their positive association of quality with advertisements;the third group with 36 subjects served as the control group.The following is the ANOVA table obtained from the data in the study.(Some entries have been replaced by _**.) What is the estimate of the common population standard deviation $\sigma$? A) = 3.068 B) = 0.785 C) = 8.740 D) = 0.616 E)This cannot be determined with the information given.

Question

Quizplus · Accepted Answer

The estimate of the common population standard deviation is given by the square root of the mean squared error (MSE) which can be found in the ANOVA table. In this case, the MSE is = 0.785, so the estimate of the common population standard deviation is the square root of 0.785, which is approximately 0.887 (rounded to three decimal places). Therefore, choice B is the correct answer.

Quality Ratings of a New Line of Take-Home Refrigerated Entrées σ\sigmaσ

Quality Ratings of a New Line of Take-Home Refrigerated Entrées $\sigma$