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A random sample of 400 college students was selected and 120 of them had at least one motor vehicle accident in the previous two years. A random sample of 600 young adults not enrolled in college was selected and 150 of them had at least one motor vehicle accident in the previous two years. At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a 1 or 2 tail test?
The test statistic for a two-sided significance test for a population mean is z = -2.12. What is the corresponding P -value?
From the given probability distribution finite the mean and standard deviation.
Assume we have a population of scores with a mean of 975 and a standard deviation of 15. Assume that the distribution is normal. Provide answers to the following questions:
Setermine the probability that a specific driver had exactly two violations?
To test whether the significant difference between two proportion test using large sample test.
Estimate the 95% confidence interval for the proportion of the electorate that support this policy.
Engineers want to design seats in commercial aircraft so that they are wide enough to fit 98% of all males. (Accommodating 100% of males would require very wide seats that would be too expensive.)
Construct the 90 percent confidence interval for the proportion of checking account customers who have a Visa card with the bank. (Round your answers to 3 decimal places.)
Dr. Richmond, a psychologist, is studying the daytime television viewing habits of college students.
Use MegaStat's output for multiple regression to determine the multiple regression equation
Use either Linear Programming module or Transportation module of Cd to minimize the shipping costs involved in move.
If computing a causal linear regression model of y = a + bX and the resultant r2 is very near zero, then one would be able to conclude that:
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