) Suppose that we want to get the rejection region for a one-sided right-hand side (small) hypothesis testing at 5% significance level α = 0.05 with sample size, n = 10. Hence, Find the critical region for a one-sided left-hand side (large α) at 1% level α = 0.01 and sample size n = 22 b) A normal population has a variance of 9.0. A random sample of size 9 gives sample variance 8.01 which was drawn from a normal population. Determine whether the variance from this random sample is 9.0. Test at 5% level of significance

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.