A researcher is interested in studying the average number of traffic violations

Question

A researcher is interested in studying the average number of traffic violations received by male vs. female drivers. The researcher has a sample of 30 male drivers and 32 female drivers and conducts a two-sample t-test (two-tailed, alpha = 0.5). The researcher finds the following: Male drivers have an average of 4 traffic violations every year. Female drivers have an average of 2 traffic violations every year. The standard error of the mean difference between male and female drivers (i.e., the se) is 50. Using this information, identify the correct answer for each item below. _____ The obtained t-statistic A. 200 The critical t value B. 100 Degrees of freedom C. 34 What will the researcher conclude? D. 4.00 E. Reject the null hypothesis. F. Fall to reject the null hypothesis G. 60

Explanation / Answer

obtained t value =(x1-x2)/std error =(4-2)/0.5 =4   

critical t value =2.000

degree of freedom =32+30-2=60

reject the null hypothesis

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