# Question

With reference to Exercise 11.32, construct a 90% confidence interval for the standard deviation of the population sampled, that is, for the percentage of impurities in the given brand of peanut butter.

## Answer to relevant Questions

With reference to Exercise 11.24, use the large-sample confidence- interval formula of Exercise 11.19 to construct a 99% confidence interval for the standard deviation of the annual growth of the given kind of cactus. In ...Show that if x is used as a point estimate of µ and s is known, the probability is 1 – α that | – µ|, the absolute value of our error, will not exceed a specified amount e when (If it turns out that n < 30, this ...Show that if µ1 < µ0 in Example 12.4, the Neyman-Pearson lemma yields the critical region With reference to Example 12.5, suppose that we reject the null hypothesis if x ≤ 15 and accept it if x > 15. Calculate µ(θ) for the same values of θ as in the table on page 341 and plot the graph of the power function ...Show that for k = 2 the likelihood ratio statistic of Exercise 12.25 can be expressed in terms of the ratio of the two sample variances and that the likelihood ratio test can, therefore, be based on the F distribution.Post your question

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