man loves, as everyone should, to collect and analyze statistical information. He wishes to find a relationship between how many hours students study and how they do on their statistics tests. He takes a random sample of 16 students at Ideal U., asks how many hours they studied for a university-wide stat test and how they did on the test, enters the data into a computer for analysis and presents the results below. ANALYSIS OF HOURS AND GRADES (n = 16): Descriptive Statistics: HOURS GRADES Mean: 4.2 75.8 Mode: 5.0 79.0 St. Dev: 2.3 10.1 Quartiles: Q0 2.0 34.0 Q1 3.2 53.7 Q2 4.7 78.5 Q3 6.3 86.9 Q4 9.0 97.0 Regression Analysis: Reg. Eq. is: GRADE = 16.9 + 9.025*HOURS Rsquared = .985 std error = 0.027 F = 8.52 p = .018 What is the median number of hours studied? a. 2.3 b. 4.7 c. 4.5 d. 4.2 e. 5.5 f. 5 g. cannot be determined
man loves, as everyone should, to collect and analyze statistical information.
He wishes to find a relationship between how many hours students study and how they do on their statistics tests.
He takes a random sample of 16 students at Ideal U., asks how many hours they studied for a university-wide stat test
and how they did on the test, enters the data into a computer for analysis and presents the results below.
ANALYSIS OF HOURS AND GRADES (n = 16):
HOURS GRADES
Mean: 4.2 75.8
St. Dev: 2.3 10.1
Q0 2.0 34.0
Q1 3.2 53.7
Q2 4.7 78.5
Q3 6.3 86.9
Q4 9.0 97.0
Reg. Eq. is: GRADE = 16.9 + 9.025*HOURS
Rsquared = .985 std error = 0.027 F = 8.52 p = .018
What is the
| a. |
2.3 |
|
| b. |
4.7 |
|
| c. |
4.5 |
|
| d. |
4.2 |
|
| e. |
5.5 |
|
| f. |
5 |
|
| g. |
cannot be determined |
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