A random sample of 30 colleges from kiplinger's list of the best values in private college provided the data shown in the datafi
le named bestprivatecolleges (kiplinger, october 2013). the variable named admit rate (%) shows the percentage of students that applied to the college and were admitted, and the variable named 4-yr grad. rate (%) shows the percentage of students that were admitted and graduated in four years.
1 answer:
Answer:
Explanation:
(a). By plotting the data on an Excel spreadsheet, the uploaded image below represents our findings
(b) The sample correlation coefficient is calculated using the Excel Correlation function as follows;
Admission Rate (%) 4-Year Graduation Rate (%)
44 73
71 62
29 89
39 86
66 55
28 73
54 63
10 88
26 84
43 77
76 71
67 68
6 86
66 59
81 66
18 88
31 71
9 84
15 86
8 88
17 84
56 62
51 79
54 68
75 50
13 86
40 70
67 68
41 47
68 71
∴ The calculated value of the sample correlation coefficient is = -0.76
This indicates that the two variables exhibit a moderately linear inverse correlation.
Cheers, I hope this is useful.
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