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Four groups, freshmen, sophomores, juniors, and seniors are coded 1, 2, 3, and 4 in a...

  1. Four groups, freshmen, sophomores, juniors, and seniors are coded 1, 2, 3, and 4 in a dataset. In the table below, record values that would be appropriate for comparing the means of freshmen, sophomores, and juniors (all three combined) to the means of seniors.

Class

Pre-planned contrast coefficient

Freshmen

Sophomores

Juniors

Seniors

a. Write an alternative hypothesis (H1) to accompany the following null hypothesis:

H0: the mean scores earned on quiz #1 are equal for all three classifications (So., Jr., Sr.)

math   Statistics-And-Probability   
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Answer #1

Alternative hypothesis :

The mean scores earned on quiz #1 are not equal for all three classifications (So., Jr., Sr.)

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