group comparison testing_answerkey

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Rumson Fair Haven Reg H *

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101

Subject

Statistics

Date

Nov 24, 2024

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pdf

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Uploaded by CoachRiverTiger30

The Bronx High School of Science Ms. Varuzza MS2: Group Comparison Testing 1. Itis hypothesized that the variance in the number of murders committed in selected cities on East Coast is greater than the variance of the number of murders committed on the West Coast. A sample of size selected cities on the West Coast has a standard deviation of 206. A sample of six cities on the East Coast has a standard deviation of 215. Test the hypothesis at ¢ = 0.10. State the hypotheses and identify the claim (3 points) Find the critical value (1 points) Compute the test value (2 points) Make a decision (1 point) Summarize results (1 point) BHE ¥ 1.089 do notregyecf null hypsihasis o 150t encugh -e e 7 SWY/)% Clprm 2. The average income of 15 families who reside in a large metropolitan East Coast city is $62,456. The standard deviation is $9652. The average income of 11 families who reside in a rural area of the Midwest is $60,213, with a standard deviation of $2009. At a = 0.05, can it be concluded that the families who live in the cmes have a higher income than those who live in the rural areas? Use the P-value method. a. State the hypotheses and identify the claim (3 points) «) b. [ d. Find the critical value (1 points) Compute the test value (2 points) Make a decision (1 point) Summarize results (1 point) He: // S A WA, > A (0lim) " =05 196 a ~p23) -0 242 PR G AR B5 1. 3THL pr ’ AYob £ 196 clo rotTejec null Thet (50 /'fnaﬂhfu’m” 4 HTC 1z it = 186l 5 elasm

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