ow large a sample is necessary
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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![For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.
The National Council of Small Businesses is interested in the proportion of small businesses that declared Chapter 11 bankruptcy last year. Since there are so many small businesses, the National Council intends
estimate the proportion from a random sample. Let p be
the proportion of small businesses that declared Chapter 11 bankruptcy last year.
n USE SALT
(a) If no preliminary sample is taken to estimate p, how large a sample is necessary to be 98% sure that a point estimate p will be within
distance of 0.11 from p? (Round your answer up to the nearest whole number.)
small businesses
(b) In a preliminary random sample of 30 small businesses, it was found that six had declared Chapter 11 bankruptcy. How many more small businesses should be included in the sample to be 98% sure that a point estimate p will be within a distance of 0.110
from p? (Round your answer up to the nearest whole number.)
more small businesses](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F128a7318-3c75-4fa0-bac7-7b338f0949b5%2F2d76e89c-cdd8-4526-8d71-b81c9f20e5da%2Fonu1yr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.
The National Council of Small Businesses is interested in the proportion of small businesses that declared Chapter 11 bankruptcy last year. Since there are so many small businesses, the National Council intends
estimate the proportion from a random sample. Let p be
the proportion of small businesses that declared Chapter 11 bankruptcy last year.
n USE SALT
(a) If no preliminary sample is taken to estimate p, how large a sample is necessary to be 98% sure that a point estimate p will be within
distance of 0.11 from p? (Round your answer up to the nearest whole number.)
small businesses
(b) In a preliminary random sample of 30 small businesses, it was found that six had declared Chapter 11 bankruptcy. How many more small businesses should be included in the sample to be 98% sure that a point estimate p will be within a distance of 0.110
from p? (Round your answer up to the nearest whole number.)
more small businesses
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