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Posted - 02/26/2012 :  08:59:03  Show Profile  Reply with Quote
Out of 15 statistics problems this week...I am down to the last 2. Please help me. Thank you in advance :)

Problem 1.

Three supermarket chains in the Denver area each claim to have the lowest overall prices. As part of an investigative study on supermarket advertising, the Denver Daily News conducted a study. First, a random sample of nine grocery items was selected. Next, the price of each selected item was checked at each of the three chains on the same day. Use 0.05 level of significance.

Item Super$ Ralph's Lowblaws
1 $1.21 $1.20 $1.70
2 1.41 1.10 1.12
3 1.27 1.79 2.80
4 2.22 2.90 2.23
5 2.04 2.01 2.03
6 4.40 4.23 4.51
7 5.50 4.59 5.50
8 4.86 4.31 4.76
9 5.25 5.64 5.68

What is the decision rule for both? (Round your answer to 2 decimal places.)

For Stores, reject H0 if F > _________
For Items, reject H0 if F > _________

Problem 2.

In an ANOVA table MSE was equal to 10. Random samples of six were selected from each of four populations, where the sum of squares total was 250.

(b) What is the decision rule? Use the .05 significance level. (Round your answer to 2 decimal places.)

Reject H0 if F> _________
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Posted - 02/27/2012 :  12:53:59  Show Profile  Reply with Quote
Calculate degrees of freedom and find the critical values in an F table.
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