# Question

For each of the following combinations of a and degrees of freedom (df), use Table VII in Appendix B to find the values of x2α/2 and, x2(1-α/2) that would be used to form a confidence interval for σ2.

a. α = .05, df = 7

b. α = .10, df = 16

c. α = .01, df = 20

d. α = .05, df = 20

a. α = .05, df = 7

b. α = .10, df = 16

c. α = .01, df = 20

d. α = .05, df = 20

## Answer to relevant Questions

Refer to Exercise 7.97. For each part, a-d, form a 90% confidence interval for σ. In Exercise 7.97 Given the following values of x , s , and n , form a 90% confidence interval for s2 . a. = 21, s = 2.5, n = 50 b. = ...Is honey a cough remedy? Refer to the Archives of Pediatrics and Adolescent Medicine (Dec. 2007) study of honey as a remedy for coughing, Exercise. Recall that the 105 ill children in the sample were randomly divided into ...Refer to the Environmental Science & Technology (September 1, 2000) study on the ammonia levels near the exit ramp of a San Francisco highway tunnel, presented in Exercise 2.184 (p. 100). The ammonia concentration (parts per ...By law, all new cars must be equipped with both driver-side and passenger- side safety air bags. There is concern, however, over whether air bags pose a danger for children sitting on the passenger side. In a National ...Explain the difference between a one-tailed and a two tailed test.Post your question

0