Homework Help is Here – Start Your Trial Now!
Math
Statistics
Pick the correct answer and give some explaination, i make it as one question becase its have simple asnwer A bank manager claims that there has been a change in the waiting time to be served by customer services. Previously, the average waiting time was 15 minutes. Someone wants to prove and test the manager's statement with a significance level of α. The critical areas for such testing are: Z ≤-Z alpha/2 and Z ≥ Z alpha/2  Z > -Z alpha and Z -Z alpha/2 and Z < Z alpha/2  Z < -Z alpha and Z > Z alpha Suppose that a bag of cement has weight that are normally distributed with a mean of 50 kg and a standard deviation of 1 kg. If a random sample of ten bags of cement is taken, the sample mean of the bag weight: Will be equal to 50.  Is equally likely to be smaller or larger than 50  Is more likely to be larger than 50 than smaller than 50 Is less likely to be larger than 50 than smaller than 50 In testing a hypothesis of two population means, if the t distribution is used, which of the following assumptions is required? The standard deviations are not the same. The sample sizes are equal. Both population means are the same.  Both populations are normally distributed

Pick the correct answer and give some explaination, i make it as one question becase its have simple asnwer A bank manager claims that there has been a change in the waiting time to be served by customer services. Previously, the average waiting time was 15 minutes. Someone wants to prove and test the manager's statement with a significance level of α. The critical areas for such testing are: Z ≤-Z alpha/2 and Z ≥ Z alpha/2  Z > -Z alpha and Z -Z alpha/2 and Z < Z alpha/2  Z < -Z alpha and Z > Z alpha Suppose that a bag of cement has weight that are normally distributed with a mean of 50 kg and a standard deviation of 1 kg. If a random sample of ten bags of cement is taken, the sample mean of the bag weight: Will be equal to 50.  Is equally likely to be smaller or larger than 50  Is more likely to be larger than 50 than smaller than 50 Is less likely to be larger than 50 than smaller than 50 In testing a hypothesis of two population means, if the t distribution is used, which of the following assumptions is required? The standard deviations are not the same. The sample sizes are equal. Both population means are the same.  Both populations are normally distributed

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question

Pick the correct answer and give some explaination, i make it as one question becase its have simple asnwer

A bank manager claims that there has been a change in the waiting time to be served by customer services. Previously, the average waiting time was 15 minutes. Someone wants to prove and test the manager's statement with a significance level of α. The critical areas for such testing are:

  1. Z ≤-Z alpha/2 and Z ≥ Z alpha/2
  2.  Z > -Z alpha and Z <Z alpha
  3.  Z > -Z alpha/2 and Z < Z alpha/2
  4.  Z < -Z alpha and Z > Z alpha

Suppose that a bag of cement has weight that are normally distributed with a mean of 50 kg and a standard deviation of 1 kg. If a random sample of ten bags of cement is taken, the sample mean of the bag weight:

  1. Will be equal to 50.
  2.  Is equally likely to be smaller or larger than 50
  3.  Is more likely to be larger than 50 than smaller than 50
  4. Is less likely to be larger than 50 than smaller than 50

In testing a hypothesis of two population means, if the t distribution is used, which of the following assumptions is required?

  1. The standard deviations are not the same.
  2. The sample sizes are equal.
  3. Both population means are the same.
  4.  Both populations are normally distributed

 

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS