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
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
100%

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

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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