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Time to help a stranger was investigated by a group of undergraduate psychology majors as a part of their Introduction to Research Methods course. The students thought that gender of the person asking for help would be a factor, as would the dress of the person asking for help. So to investigate this, the students staged a car problem on a busy parking lot at the mall. One male and one female student (dressed casually but neatly) and another male and female (dressed grunge) acted as if their car wouldn't start. Other students sitting in their own cars clocked the length of time (in minutes) a stranger would attempt to help these four actors.
a. Conduct the appropriate analysis to determine if there were significant effects of gender and dress.
b. Construct the appropriate graph and interpret.
Casual
Male
14
11
12
Female
25
20
15
Grunge
8
5
7
State the statistical assumptions of this test Using the data set you have selected, select independent and dependent variables.
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Find out the range of the following set of whole numbers: 12, 13, 15, 17, 12, 18, 12, 19, 13, 12, 14, 13, 12, 15
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P(A 1 )= .20, P(A 2 ), and P(A 3 )= .40. P(B 1 I A 1 ) = .25. P(B 1 I A 2 ) = .05. P(B 1 I A 3 )=.10. Use Bayes' theorem to determine P(A 3 I B 1 )
Would it be reasonable to conclude that the population mean is 63 pounds?
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Smith Software Inc. is a computer software firm that has grown in size in recent years. To assist in its planning for future growth, you are to determine the trend of the number of accounts based upon the below.
A local bank reported to the federal government that its 5,246 saving accounts have a mean of $1,000 and standard deviation of $240.
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