Quality ratings of a new line of takehome refrigerated entres were obtained from three randomly formed groups of customers who were exposed to...

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 (Some entries have been replaced by **.)

1What is the estimate of the common population standard deviation σ?

sp= 0.785

sp= 8.740

sp= 0.616

This cannot be determined with the information given.

2What is the estimate of the common population standard deviation σ?

sp= 0.785

sp= 8.740

sp= 0.616

This cannot be determined with the information given.