Although the binomial distribution is discrete and the normal distribution is continuous, the normal distribution is a good approximation for the binomial whenever nP(1 - P) > 9 where n = number of trials, and P = the probability of success in any
given trial. Indicate whether the statement is true or false
Q. 2A chi-square goodness-of-fit-test is to be performed. If the degrees of freedom are 8, and = 0.10, then the table chi-square value that defines the rejection region is:
A) 13.362
B) 15.507
C) 17.535
D) 12.017
Q. 3In a multiple regression model, which of the following is true of the value of R2 adjusted for the degrees of freedom?
A) It can be negative.
B) It has to be positive.
C) It has to be larger than the multiple coefficient of determination.
D) It can be larger than 1.
Q. 4The number of males selected from a sample of 5 students taken without replacement from a class of 9 females and 18 males has a hypergeometric distribution.
Indicate whether the statement is true or false
Q. 5In order to construct a confidence interval estimate for the difference between two population means, independent samples are obtained from two normal populations with unknown but assumed to be equal variances.
If the first sample contains 18 items and the second sample contains 14 items, which of the following distributions will be used?A) the t distribution with 32 degrees of freedom
B) the t distribution with 17 degrees of freedom
C) the t distribution with 13 degrees of freedom
D) the t distribution with 30 degrees of freedom
Q. 6Of those in the sample who went partying the weekend before the final exam, what percentage of them did poorly in the exam?
What will be an ideal response?
Q. 7Calculate the correlation coefficient between the size of the sales force and gross sales.
What will be an ideal response?
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