In each of Exercises, we have provided a sample standard deviation and sample size. In each case, use the onestandarddeviation χ2-test and the one-standard-deviation χ2-interval procedure to conduct...

In each of Exercises, we have provided a sample standard deviation and sample size. In each case, use the onestandarddeviation χ2-test and the one-standard-deviation χ2-interval procedure to conduct the required hypothesis test and obtain the specified confidence interval.

s = 2 and n = 10

a. H0: σ = 4, Ha: σ<4, a="">
b. 90% confidence interval