Can someone please explain how to do these? QUESTION 2 1 points Save Answer Dete
ID: 3372147 • Letter: C
Question
Can someone please explain how to do these?
QUESTION 2 1 points Save Answer Determine and enter the numerator degrees of freedom (D1, formula 11.3) that would be used to conduct a two-tailed test of the variances for two populations where the sample size from the first population is 25 and the sample size from the second is 35. Assume the variance for the sample selected from the first population is larger and would be in the numerator when calculating the value of the test statistic F QUESTION 3 1 points Save Answer Determine the upper critical value of F for a two-tail test where the sample size for the variance (larger) in the numerator is 23, the sample size for the variance in the denominator (smaller) is 33, and alpha is 0.04. Use Excel's "FINV" function, compare your answer to those in the F-Distribution tables in the book that should be closest to it, and enter your response to three decimal places (G.e. 21.123) QUESTION 4 1 points Save Answer Determine the critical value of F for a one-tail test to the right where the sample size for the variance in the numerator is 20, the sample size for the variance in the denominator is 37, and alpha is 0.02. Use Excel's "FINV" function, compare your answer to those in the F-Distribution tables in the book that should be closest to it, and enter your response to three decimal places (i.e. 21.123) QUESTION 5 1 points Save Answer Calculate the value of the test statistic F where the larger standard deviation for the sample selected from one population is 91.83 and the smaller standard deviation from the sample selected from the other population is 84.84. Use the larger standard deviation in the numerator to insure your answer is greater than one. Enter your response to two decimal places (i.e. 2.12)Explanation / Answer
2)degree of freedom for numerator =sample size for sample in numerator-1=25-1=24
3)here from excel function; u can put this into cell to get crtiical value =finv(0.04,23-1,33-1)=1.964
4)
please put =finv(0.02,20-1,37-1)=2.207
5)
here test statsitic =(s1/s2)2 =(91.83/84.84)2 =1.17