Mind On Statistics - Chapter 13 Worksheets With Answers (Page 19 of 32) in pdf

Mind On Statistics - Chapter 13 Worksheets With Answers Page 19

Chapter 13

Questions 96 to 99: Spatial perception is measured on a scale from 0 to 10. Two groups of 8

grade children are

tested for spatial perception. The students in group 1 were first given a short course on spatial concepts. The students

in group 2 received no such instruction. SPSS was used to calculate descriptive statistics for the two samples.

96. What is the value of the pooled standard error?

A. 0.483

B. 0.693

C. 1.537

D. 0.729

KEY: D

97. What is the value of the test statistic for the pooled two sample t-test?

A. 1.39

B. 2.79

C. 2.93

D. 4.21

KEY: B

98. What do we know about the p-value if we wish to test if participation in the course results in significantly

higher spatial perception scores?

A. p-value < 0.01

B. 0.01 < p-value < 0.025

C. 0.025 < p-value < 0.05

D. p-value > 0.05

KEY: A

99. Which of the following is an appropriate conclusion?

A. The population mean spatial perception score of children who take the course on spatial concepts is more

than 2 points higher than the population mean score of children who don’t take the course.

B. The mean spatial perception score of children who take the course on spatial concepts is significantly

higher than the average score of children who don’t take the course.

C. The mean spatial perception score of children who take the course on spatial concepts is not significantly

higher than the average score of children who don’t take the course.

D. The mean spatial perception score of children who take the course on spatial concepts is higher than the

average score of children who don’t take the course.

KEY: B

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Mind On Statistics - Chapter 13 Worksheets With Answers Page 19