dure is the appropriate proced (c) You do not know the population standard deviation o. 20.23 Which of these settings does not allow use of a matched pairs t procedure? (a) You interview both the instructor and one of the students in each of 20 introductory statistics classes and ask each how many hours per week homework assignments require. (b) You interview a sample of 15 instructors and another sample of 15 students and ask each how many hours per week homework assignments require. (c) You interview 40 students in the introductory statistics course at the beginning of the semester and again at the end of the semester and ask how many 0% hours per week homework assignments require.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Question
20.23
n a Normally
e would you
For the mean
100 based
mal popula-
tically sig-
tes were
all U.S.
$70,000
usehold
20,000.)
sidered
s of the
e mean
molds is
ology
sof
for
Exercises
459
20.22 Which of the following would cause the most worry
about the validity of the confidence interval you calcu-
lated in the previous exercise?
(a) You notice that there is a clear outlier in the data.
(b) A stemplot of the data is bell-shaped, so a z proce-
dure is the appropriate procedure.
(c) You do not know the population standard deviation o.
20.23 Which of these settings does not allow use of a matched
pairs t procedure?
(a) You interview both the instructor and one of the
students in each of 20 introductory statistics classes
and ask each how many hours per week homework
assignments require.
(b) You interview a sample of 15 instructors and another
sample of 15 students and ask each how many hours
per week homework assignments require.
(c) You interview 40 students in the introductory
statistics course at the beginning of the semester and
again at the end of the semester and ask how many
hours per week homework assignments require.
20.24 Because the t procedures are robust, the most impor-
tant condition for their safe use is that
(a) the sample size is at least 15.
(b) the population distribution is exactly Normal.
(c) the data can be regarded as an SRS from the
population.
study of student achievement in large urban school dis
tricts. TUDA gives a mathematics test scored from 0 to
500. A score of 262 is a "basic" mathematics level, and
a score of 299 is "proficient." Scores for a random sam-
Transcribed Image Text:n a Normally e would you For the mean 100 based mal popula- tically sig- tes were all U.S. $70,000 usehold 20,000.) sidered s of the e mean molds is ology sof for Exercises 459 20.22 Which of the following would cause the most worry about the validity of the confidence interval you calcu- lated in the previous exercise? (a) You notice that there is a clear outlier in the data. (b) A stemplot of the data is bell-shaped, so a z proce- dure is the appropriate procedure. (c) You do not know the population standard deviation o. 20.23 Which of these settings does not allow use of a matched pairs t procedure? (a) You interview both the instructor and one of the students in each of 20 introductory statistics classes and ask each how many hours per week homework assignments require. (b) You interview a sample of 15 instructors and another sample of 15 students and ask each how many hours per week homework assignments require. (c) You interview 40 students in the introductory statistics course at the beginning of the semester and again at the end of the semester and ask how many hours per week homework assignments require. 20.24 Because the t procedures are robust, the most impor- tant condition for their safe use is that (a) the sample size is at least 15. (b) the population distribution is exactly Normal. (c) the data can be regarded as an SRS from the population. study of student achievement in large urban school dis tricts. TUDA gives a mathematics test scored from 0 to 500. A score of 262 is a "basic" mathematics level, and a score of 299 is "proficient." Scores for a random sam-
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