A local consumer reporter wants to compare the average oosts of grocery items pu

Question

A local consumer reporter wants to compare the average oosts of grocery items purchased at tbree diflerent supermarkets, A, B, and C. Prices (n dolars) were recorded for a sample of 80 randomly selected grocery items atf each of the three supermarkets In order to reduce tem to-am variation, the prices were reorded foreach em on the same day at each supermarket. The resuts of the ANOVA est are summarized in he following table. What is the value of the test statistic for determining whether the three supermarkets have the same average prices? Click the loon to view the ANOVA table O A 0.0001 ??. 1.3206 O ANOVA table 0 216.5049311 3 6541514 54 000 Error Corrected 118 3 9726322 0 0336656 Tow 170 222 2087311 Pint Done

Explanation / Answer

Result:

Part 1

ANOVA test statistic

B). 39.23

Part2

C. we are 95% confident that service charge(y) will increase between $15 and $25 for every $1 million increases in sales revenue(x).

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