Answer Case 4 to 6 only HAVE CONFIDENCE AND BE THE BEST!Study and analyze each case. Apply the formula necessary to solve the stated problem.CASE 1:A random sample of size 70 has a standard deviation of 3.12. Assuming that there is a 92%confidence level, what is the margin of error?CASE 2:In a sample of 100 cars with a standard deviation of 25km/n speed. Find the margin of error ifthe level of confidence is 90%.CASE 3:Mr. V wanted to know the average weight (in kilos) of students in LAO University. He took arandom sample of 300 students and discovered that their average weight 55kg with a standarddeviation of 0.8kg. Construct a 95% confidence interval for the mean weight of students in theUniversity.CASE 4:The average price of a 50 cellphones is P13,500 with a sample standard deviation of P750.Find the 98% confidence interval of the true average price of the cellphones.CASE 5:Compute for the sample size needed if the margin of error is 15, with sample standarddeviation of 43 and a 98% level of confidence.CASE 6:Yeshua wants to have a sample size of the number of children that he needs for his surveyproject. If he used a 99% confidence interval and a margin of error of 135.8 with a standarddeviation of 400, find the sample size he needs.

Case (4) we have given that Sample size n = 50 Sample mean =13500 Sample standard deviation =750…

ASE 4: e average price of a 50 cellphones is P13,500 with a sample standard deviation of P750. d the 98% confidence interval of the true average price of the cellphones. SE 5: mpute for the sample size needed if the margin of error is 15 with sample standard

ASE 4: e average price of a 50 cellphones is P13,500 with a sample standard deviation of P750. d the 98% confidence interval of the true average price of the cellphones. SE 5: mpute for the sample size needed if the margin of error is 15 with sample standard

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

Answer Case 4 to 6 only

HAVE CONFIDENCE AND BE THE BEST!
Study and analyze each case. Apply the formula necessary to solve the stated problem.
CASE 1:
A random sample of size 70 has a standard deviation of 3.12. Assuming that there is a 92%
confidence level, what is the margin of error?
CASE 2:
In a sample of 100 cars with a standard deviation of 25km/n speed. Find the margin of error if
the level of confidence is 90%.
CASE 3:
Mr. V wanted to know the average weight (in kilos) of students in LAO University. He took a
random sample of 300 students and discovered that their average weight 55kg with a standard
deviation of 0.8kg. Construct a 95% confidence interval for the mean weight of students in the
University.
CASE 4:
The average price of a 50 cellphones is P13,500 with a sample standard deviation of P750.
Find the 98% confidence interval of the true average price of the cellphones.
CASE 5:
Compute for the sample size needed if the margin of error is 15, with sample standard
deviation of 43 and a 98% level of confidence.
CASE 6:
Yeshua wants to have a sample size of the number of children that he needs for his survey
project. If he used a 99% confidence interval and a margin of error of 135.8 with a standard
deviation of 400, find the sample size he needs.

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