The Wall Street Journal reported that approximately 25% of the people who are told a product is improved will believe that it is, in fact, improved. The remaining 75% believe that this is just hype (the same old thing with no real improvement). Suppose a marketing study consists of a random sample of ten people who are given a sales talk about a new, improved product. (a) Make a histogram showing the probability that r = 0 to 10 people believe the product is, in fact, improved. (b) Compute the mean and standard deviation of this probability distribution. (Round your standard deviation to two decimal places.) ? = people ? = people (c) What is the smallest number of people needed in the marketing study to be at least 99% sure that at least one person believes the product to be improved? (Hint: Note that P(r ≥ 1) = 0.99 is equivalent to 1 − P(0) = 0.99, or P(0) = 0.01.) people
The Wall Street Journal reported that approximately 25% of the people who are told a product is improved will believe that it is, in fact, improved. The remaining 75% believe that this is just hype (the same old thing with no real improvement). Suppose a marketing study consists of a random sample of ten people who are given a sales talk about a new, improved product. (a) Make a histogram showing the probability that r = 0 to 10 people believe the product is, in fact, improved. (b) Compute the mean and standard deviation of this probability distribution. (Round your standard deviation to two decimal places.) ? = people ? = people (c) What is the smallest number of people needed in the marketing study to be at least 99% sure that at least one person believes the product to be improved? (Hint: Note that P(r ≥ 1) = 0.99 is equivalent to 1 − P(0) = 0.99, or P(0) = 0.01.) people
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The Wall Street Journal reported that approximately 25% of the people who are told a product is improved will believe that it is, in fact, improved. The remaining 75% believe that this is just hype (the same old thing with no real improvement). Suppose a marketing study consists of a random sample of ten people who are given a sales talk about a new, improved product.
(a) Make a histogram showing the probability that r = 0 to 10 people believe the product is, in fact, improved.
(b) Compute the mean and standard deviation of this probability distribution. (Round your standard deviation to two decimal places.)
(c) What is the smallest number of people needed in the marketing study to be at least 99% sure that at least one person believes the product to be improved? (Hint: Note that P(r ≥ 1) = 0.99 is equivalent to 1 − P(0) = 0.99, or P(0) = 0.01.)
people
| ? = people |
| ? = people |
(c) What is the smallest number of people needed in the marketing study to be at least 99% sure that at least one person believes the product to be improved? (Hint: Note that P(r ≥ 1) = 0.99 is equivalent to 1 − P(0) = 0.99, or P(0) = 0.01.)
people
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