5 questions thanks^_^

21A n important application of the chi-square distribution is a. making inferences about a single population variance b. testing for goodness of fit testing for the independence of two variables d. c. All of these alternatives are correct. 22. The number of degrees of freedom for the appropriate chi-square distribution in a test of independence is a. n-1 b. k-1 c. number of rows minus 1 times number of columns minus 1 d. a chi-square distribution is not used 23. In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be a. at least 5 b. at least 10 c. no more than 5 d. less than 2 24. A statistical test conducted to determine whether to reject or not reject a hypothesized probability distribution for a population is known as a a. contingency test b. probability test c. goodness of fit test d. None of these altematives is correct. 25. The degrees of freedom for a contingency table with 12 rows and 12 columns is a. 144 b. 121 d. 120