The article "So Close, Yet So Far: Predictors of Attrition in College Seniors" attempts to describe differences between college seniors who dis-enroll before graduating and those who do graduate. Researchers randomly selected 42 non-returning and 48 graduating seniors, none of whom were transfer students. These 90 students rated themselves on personal contact and campus involvement. The resulting data is summarized here: Returning n= 48 Mean Standard Deviation Nonreturning n= 42 Mean Standard Deviation Personal Contact 3.22 93 Personal Contact 2.41 1.03 Campus Involvement 3.21 1.01 Campus Involvement 3.31 1.03 Construct a 95% confidence interval for the difference in mean campus involvement rating for returning and non-returning students. Does your interval support the statement that students who do
The article "So Close, Yet So Far: Predictors of Attrition in College Seniors" attempts to describe differences between college seniors who dis-enroll before graduating and those who do graduate. Researchers randomly selected 42 non-returning and 48 graduating seniors, none of whom were transfer students. These 90 students rated themselves on personal contact and campus involvement. The resulting data is summarized here: Returning n= 48 Mean Standard Deviation Nonreturning n= 42 Mean Standard Deviation Personal Contact 3.22 93 Personal Contact 2.41 1.03 Campus Involvement 3.21 1.01 Campus Involvement 3.31 1.03 Construct a 95% confidence interval for the difference in mean campus involvement rating for returning and non-returning students. Does your interval support the statement that students who do
MATLAB: An Introduction with Applications
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Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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
Transcribed Image Text:The article "So Close, Yet So Far: Predictors of Attrition in College Seniors" attempts to describe
differences between college seniors who dis-enroll before graduating and those who do graduate.
Researchers randomly selected 42 non-returning and 48 graduating seniors, none of whom were
transfer students. These 90 students rated themselves on personal contact and campus involvement.
The resulting data is summarized here:
Returning n= 48
Mean
Standard Deviation
Nonreturning n = 42
Mean
Standard Deviation
Personal Contact
3.22
93
Personal Contact
2.41
1.03
Campus Involvement
3.21
1.01
Campus Involvement
3.31
1.03
Construct a 95% confidence interval for the difference in mean campus involvement rating for
returning and non-returning students. Does your interval support the statement that students who do
not return are less involved, on average than those who do? Explain.
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