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of the difference of the proportions (upperclassmen - lowerclassmen) based his data? Select one: 0.63 0.58 а. (0.63 – 0.58) ± t* (- + V250 V400 b. (0.63 – 0.58) z*. (0.63)(1–0.63) + (0.58)(1–0.58) 250 400 (0.63)(1–0.63) (0.58)(1–0.58) + С. (0.63 – 0.58) ± z* • 250 400 d. (0.63 – 0.58) ± t* • 0.632 0.58- 250 400

of the difference of the proportions (upperclassmen - lowerclassmen) based his data? Select one: 0.63 0.58 а. (0.63 – 0.58) ± t* (- + V250 V400 b. (0.63 – 0.58) z*. (0.63)(1–0.63) + (0.58)(1–0.58) 250 400 (0.63)(1–0.63) (0.58)(1–0.58) + С. (0.63 – 0.58) ± z* • 250 400 d. (0.63 – 0.58) ± t* • 0.632 0.58- 250 400

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section: Chapter Questions
Problem 27T
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Which of the following formulas would be used to calculate a confidence interval of the difference of the proportions (upperclassmen - lowerclassmen) based on this data? Select one: 0.63 + /250 0.58 a. (0.63 – 0.58) ±t*(- V400 V b. (0.63 – 0.58) + z* . (0.63)(1–0.63) + (0.58)(1–0.58) 250 400 C. (0.63 – 0.58) ± z* (0.63)(1–0.63) (0.58)(1–0.58) + 250 400 0.632 (0.63 – 0.58) ± t*. 0.582 + 400 250
Transcribed Image Text:Which of the following formulas would be used to calculate a confidence interval of the difference of the proportions (upperclassmen - lowerclassmen) based on this data? Select one: 0.63 + /250 0.58 a. (0.63 – 0.58) ±t*(- V400 V b. (0.63 – 0.58) + z* . (0.63)(1–0.63) + (0.58)(1–0.58) 250 400 C. (0.63 – 0.58) ± z* (0.63)(1–0.63) (0.58)(1–0.58) + 250 400 0.632 (0.63 – 0.58) ± t*. 0.582 + 400 250
A random sample of upperclassmen (juniors, seniors) and a random sample of lowerclassmen (freshman, sophomores) were asked if they use study groups for any of their classes. 157 (63%) out of 250 upperclassmen and 232 (58%) out of 400 lowerclassmen reported using study groups. Suppose all the assumptions for conducting the hypothesis test are met.
Transcribed Image Text:A random sample of upperclassmen (juniors, seniors) and a random sample of lowerclassmen (freshman, sophomores) were asked if they use study groups for any of their classes. 157 (63%) out of 250 upperclassmen and 232 (58%) out of 400 lowerclassmen reported using study groups. Suppose all the assumptions for conducting the hypothesis test are met.
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