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Twelve students enrolled in Stat 1030 were surveyed for the number of hours that they spent studying Stats Las weekend. The Survey answers are
- 0.9 2.6 9.6 1.9 4.9 2.4 2.6 0.0 1.3 7.7
Suppose that the number of weekend hours spent studying Stats by all Stat 1030 students is not bell-shaped. What’s the best estimate of the maximum number of weekend hours sent studying Stats by the 25% of Stat 1030 Students who study the least?
- 0.0 b) 4.9 c) 5.9 d) 9.9 e) None of the answers is correct to the first decimal place.
Questions 9 – 10
Psychologists tend to believe that there is a relationship between aggressiveness and order of birth. To test this belief, a psychologist chose 500 elementary school students at random and administered to each a test designed to measure the student’s aggressiveness. Each student was classified into
|
|
First Born |
Not Firstborn |
|
Aggressive |
15% |
15% |
|
Not Aggressive |
25% |
45% |
9. Is whether or not a student is firstborn related to aggressiveness?
a. yes, b, No c, Impossible to determine
10. Suppose that the psychologist is scheduled to interview a student whom she has never met. If the students is firstborn, does this indicate a general tendency toward away aggressive behvior?