Practice Exercises 24-25 x Practice xercises 24-25 x CSecure https:/f v pid 1269

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Practice Exercises 24-25 x Practice xercises 24-25 x CSecure https:/f v pid 1269343 cit tent rid 11672772 1 corse ED5069718SU101 ED50697185U101 I partedContent 201 8D513023133/MASED5061 port dCont nt 201 70731104021 SANDB Q ? Pructice Exercise 24: Determining the Appropriate Anulysis For each of the following scenarios, identify the appropriase analysis. The question is whether verbal reinforcement affects response rates. Subjects in Group 1 were verbally reinforced everytime they respond to the instnuctor's questices Subjects in roup 2 were net After 2 weeks, the two groups were compared by auging the number of students who raised their band when questices were aked. The following data were collected. iroup 1: 13, 15, 12 17, 14, 14, Group 2: 10, 12, 12, 11, 13,9 2. A gukance coutselor at a high school wanms to be hest infeemed about the universities and colleges that studens peefer most frequently. He glances at the institutions allended by last year's graduates and notes that the three cloeet colleges appear lo have about equal appeal. To tesl this assumplion, he begins asking studnts who ane plannine on postsecondary schooling where they will apply. His data are as follows The toehnical institute 22 The community college 18 The comprehemsive university 12 3. A biokogy instructor wishesto know if there is a dilference betweem performance on a state developed benchmark test and her compcehensive final examination. To maintain consistency, both test included the same number of questions (1oo, and the instructor used the number of items correct as the gade. The following data were collected from a sample of 10 students StudentState esaBiology StudentStae esam 63 73 65 51 73 . Assume that an educalor wants to know how ckeely time spent doing homework is related to student grades Data was collected from 8 students. Time spent on homework is reported in the number of hours completed per night, and grades are reporied on a4 point scale. The follkowing data were collected 25 2.00 1.00 2.00 540 PM Type here to search

Explanation / Answer

Q 1.

Ans: Two sample t-test.

Two-Sample T-Test and CI: Group 1, Group 2

Two-sample T for Group 1 vs Group 2

N Mean StDev SE Mean
Group 1 6 14.17 1.72 0.70
Group 2 6 11.17 1.47 0.60

Difference = mu (Group 1) - mu (Group 2)
Estimate for difference: 3.000
95% CI for difference: (0.908, 5.092)
T-Test of difference = 0 (vs not =): T-Value = 3.24 P-Value = 0.010 DF = 9

The estimated p-value is 0.01. hence, we can not accept the null hypothesis and conclude that there is significant affects of verbal reinforcement response rates at o.05 level of significance.

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