Required information Section 05.02 Exercise 07 - Compute confidence interval; Find necessary sample size In a sample of 100 steel canisters, the mean wall thickness was 8.1 mm with a standard deviation of 0.6 mm. Section 05.02 Exercise 07.d - Compute confidence interval; Find necessary sample size a) How many canisters must be sampled so that a 95% confidence interval will specify the mean wall thickness to within +0.08 mm? (Round up the final answer to the nearest integer.) The number of canisters that must be sampled is 221 b) How many canisters must be sampled so that a 99% confidence interval will specify the mean wall thickness to within +0.08 mm? (Round up the final answer to the nearest integer.) The number of canisters that must be sampled is 388 Find a 95% confidence interval for the mean mass of this type of concrete block. (Round the final answers to three decimal places.) The 95% confidence interval is 38.208 38.392 d); Find a 99% confidence interval for the mean mass of this type of concrete block. (Round the final answers to three decimal places.) The 99% confidence interval is ( 38.178 38.422

Required information Section 05.02 Exercise 07 - Compute confidence interval; Find necessary sample size In a sample of 100 steel canisters, the mean wall thickness was 8.1 mm with a standard deviation of 0.6 mm. Section 05.02 Exercise 07.d - Compute confidence interval; Find necessary sample size a) How many canisters must be sampled so that a 95% confidence interval will specify the mean wall thickness to within +0.08 mm? (Round up the final answer to the nearest integer.) The number of canisters that must be sampled is 221 b) How many canisters must be sampled so that a 99% confidence interval will specify the mean wall thickness to within +0.08 mm? (Round up the final answer to the nearest integer.) The number of canisters that must be sampled is 388 Find a 95% confidence interval for the mean mass of this type of concrete block. (Round the final answers to three decimal places.) The 95% confidence interval is 38.208 38.392 d); Find a 99% confidence interval for the mean mass of this type of concrete block. (Round the final answers to three decimal places.) The 99% confidence interval is ( 38.178 38.422

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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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

Required information
Section 05.02 Exercise 07 - Compute confidence interval;
Find necessary sample size
In a sample of 100 steel canisters, the mean wall thickness was 8.1 mm
with a standard deviation of 0.6 mm.
Section 05.02 Exercise 07.d - Compute confidence interval; Find
necessary sample size
a) How many canisters must be sampled so that a 95% confidence interval will specify the
mean wall thickness to within +0.08 mm? (Round up the final answer to the nearest
integer.)
The number of canisters that must be sampled is
221
b) How many canisters must be sampled so that a 99% confidence interval will specify the
mean wall thickness to within ±0.08 mm? (Round up the final answer to the nearest
integer.)
The number of canisters that must be sampled is
388
Find a 95% confidence interval for the mean mass of this type of concrete block. (Round
the final answers to three decimal places.)
The 95% confidence interval is (
38.208
38.392
d)
Find a 99% confidence interval for the mean mass of this type of concrete block. (Round
the final answers to three decimal places.)
The 99% confidence interval is (
38.178
38.422

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