QUESTION 1 Of 386 randomly selected medical students, 30 said that they planned to work in a rural community. Find a 95% confidence level to estimate the true proportion of all medical students who plan to work in a rural community QUESTION 2 33 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 11 pounds and a standard deviation of 2.6 pounds. What is the 95% confidence interval for the true mean weight of all packages received by the parcel service?_Round to nearest pound QUESTION 3 A light-bulb manufacture wants to determine how large a random sample the quality control department should take to be 99% confident that the sample mean will be within 20 hours of the population mean of all light-bulbs ( the margin of error). Determine the minimum sample size needed if we assume the population standard deviation is 250. QUESTION 4 A manufacturing company wants to use a sample to estimate the proportion of defective tennis balls that are produced by a machine and the company wants the margin of error to be within 3% (.03 ) of the population proportion of all defective tennis balls and to be 99% confident. There is no previous survey on this. What is the least number of tennis balls needed for the sample?
QUESTION 1 Of 386 randomly selected medical students, 30 said that they planned to work in a rural community. Find a 95% confidence level to estimate the true proportion of all medical students who plan to work in a rural community QUESTION 2 33 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 11 pounds and a standard deviation of 2.6 pounds. What is the 95% confidence interval for the true mean weight of all packages received by the parcel service?_Round to nearest pound QUESTION 3 A light-bulb manufacture wants to determine how large a random sample the quality control department should take to be 99% confident that the sample mean will be within 20 hours of the population mean of all light-bulbs ( the margin of error). Determine the minimum sample size needed if we assume the population standard deviation is 250. QUESTION 4 A manufacturing company wants to use a sample to estimate the proportion of defective tennis balls that are produced by a machine and the company wants the margin of error to be within 3% (.03 ) of the population proportion of all defective tennis balls and to be 99% confident. There is no previous survey on this. What is the least number of tennis balls needed for the sample?
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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QUESTION 1
Of 386 randomly selected medical students, 30 said that they planned to work in a rural community. Find a 95% confidence level to estimate the
true proportion of all medical students who plan to work in a rural community
QUESTION 2
33 packages are randomly selected from packages received by a parcel service. The sample has
deviation of 2.6 pounds. What is the 95% confidence interval for the true mean weight of all packages received by the parcel service? Round to
nearest pound
mean weight of 11 pounds and a standard
QUESTION 3
A light-bulb manufacture wants to determine how large a random sample the quality control department should take to be 99% confident that the
sample mean will be within 20 hours of the population mean of all light-bulbs ( the margin of error). Determine the minimum sample size needed if
we assume the population standard deviation is 250,
QUESTION 4
A manufacturing company wants to use a sample to estimate the proportion of defective tennis balls that are produced by a machine and the
company wants the margin of error to be within 3% (.03 ) of the population proportion of all defective tennis balls and to be 99% confident. There
is no previous survey on this. What is the least number of tennis balls needed for the sample?
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