1a) Use the normal approximation to find the indicated probability. The sample size is n, the population proportion of successes is p, and X is the number of successes in the sample. n = 100, p = 0.32: P(X < 34) b) A mail-order company has a 9% success rate. If it mails advertisements to 500 people, find the probability of getting fewer than 38 sales. c) Find the critical value zα/2 needed to construct a(n) 99.2% confidence interval. Please answer all parts of the question 1a to 1c. Thanks.

1a) Use the normal approximation to find the indicated probability. The sample size is n, the population proportion of successes is p, and X is the number of successes in the sample. n = 100, p = 0.32: P(X < 34) b) A mail-order company has a 9% success rate. If it mails advertisements to 500 people, find the probability of getting fewer than 38 sales. c) Find the critical value zα/2 needed to construct a(n) 99.2% confidence interval. Please answer all parts of the question 1a to 1c. Thanks.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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