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Author Question: A teacher finds that final grades in the statistics department are distributed as: A, 25%; B, 25%; ... (Read 102 times)

kaid0807

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on: Feb 14, 2020

Question 1

A teacher finds that final grades in the statistics department are distributed as: A, 25%; B, 25%; C, 40%; D, 5%; F, 5%. At the end of a randomly selected semester, the following grades were recorded. Calculate the chi-square test statistic χ2 used to determine if the grade distribution for the department is different than expected. Use α = 0.01.


◦ 5.25
◦ 6.87
◦ 4.82
◦ 3.41

Question 2

A teacher finds that final grades in the statistics department are distributed as: A, 25%; B, 25%; C, 40%; D, 5%; F, 5%. At the end of a randomly selected semester, the following grades were recorded. Find the rejection region used to determine if the grade distribution for the department is different than expected. Use α = 0.01.


◦ χ2 > 13.277
◦ χ2 > 7.779
◦ χ2 > 11.143
◦ χ2 > 9.488
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by kaid0807 on Feb 14, 2020

mohan

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Reply #1 on: Feb 14, 2020
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kaid0807

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Reply 2 on: Feb 14, 2020
:D TYSM

nyrave

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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