MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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sample data
Community
College Transfer
258
No Transfer
1120
Sample mean time to
graduate, in years
Sample standard
deviation time to
5.32
4.35
1.136
1.002
graduate, in years
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Transcribed Image Text:sample data Community College Transfer 258 No Transfer 1120 Sample mean time to graduate, in years Sample standard deviation time to 5.32 4.35 1.136 1.002 graduate, in years
A researcher with the Department of Education followed a cohort of students who graduated from high school in a certain year, monitoring the progress the students
made toward completing a bachelor's degree. One aspect of his research was to determine whether students who first attended community college took longer to attain
a bachelor's degree than those who immediately attended and remained at a 4-year institution. The data in the table attached below summarize the results of his study.
Complete parts a) through e) below.
Click here to view the sample data.
Click here to view Student's t-distribution table.
(Round to three decimal places as needed.)
A. The critical value is 1.284.
O B. The lower critical value is
The upper critical value is
Should the hypothesis be rejected?
Reject
the null hypothesis. The evidence
does
suggest that community college transfer students take longer to attain a bachelor's degree.
d) Construct a 90% confidence interval for ucommunity college - no transfer to approximate the mean additional time it takes to complete a bachelor's degree if you
begin in community college.
The confidence interval
the range from 0.844 to 1.096.
(Round to three decimal places as needed.)
e) Do the results of parts c) and d) imply that community college causes you to take extra time to earn a bachelor's degree?
O Yes
No
Click to select your answer and then click Check Answer.
(?
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Transcribed Image Text:A researcher with the Department of Education followed a cohort of students who graduated from high school in a certain year, monitoring the progress the students made toward completing a bachelor's degree. One aspect of his research was to determine whether students who first attended community college took longer to attain a bachelor's degree than those who immediately attended and remained at a 4-year institution. The data in the table attached below summarize the results of his study. Complete parts a) through e) below. Click here to view the sample data. Click here to view Student's t-distribution table. (Round to three decimal places as needed.) A. The critical value is 1.284. O B. The lower critical value is The upper critical value is Should the hypothesis be rejected? Reject the null hypothesis. The evidence does suggest that community college transfer students take longer to attain a bachelor's degree. d) Construct a 90% confidence interval for ucommunity college - no transfer to approximate the mean additional time it takes to complete a bachelor's degree if you begin in community college. The confidence interval the range from 0.844 to 1.096. (Round to three decimal places as needed.) e) Do the results of parts c) and d) imply that community college causes you to take extra time to earn a bachelor's degree? O Yes No Click to select your answer and then click Check Answer. (?
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