Hypothesis Testing and Probability Analysis Assessment 2022

Running head: STATISTICS 1
Hypothesis Testing and Probability Analysis
Student Name
Professor’s Name
University Name
Date

STATISTICS 2
Hypothesis Testing and Probability Analysis
Assessment Answers by (Insert your name here)
In the summary tables below, insert only the answers. You will show work after the summary
section.
Question 1 answer
1 Z=3.0
Question 2 answers
1a P= 0.97725
1b P=0.68268
Question 3 answers
2a P=0.21476
2b P=0.57048
Question 4 answer
Make sure you use full sentences for the items below. Do not simply say something like “x1<x2”
“or “reject null” without a description and explanation of how you arrived at your conclusion.
Null hypothesis:
Alternative hypothesis:
Calculated t value:
Conclusion (justify using the metrics):
Question 5 answer
Make sure you use full sentences for the items below. Do not simply say something like “x1<x2”
“or “reject null” without a description and explanation of how you arrived at your conclusion.
Null hypothesis:

STATISTICS 3
Alternative hypothesis:
Calculated z value:
Conclusion (justify using the metrics):
Question 6 answer
Make sure you use full sentences for the items below. Do not simply say something like “x1<x2”
“or “reject null” without a description and explanation of how you arrived at your conclusion.
Null hypothesis:
Alternative hypothesis:
Calculated p or t value:
Conclusion (justify using the metrics):
Work
Show all your work for the questions below.
Question 1
The population mean is $ 75
The population standard deviation is $ 10
The z-score required is given by:
z= x−μ
σ
z= 105−75
10 =3
Question 2
The average monthly phone bill is $73
The standard deviation is $11
a. The probability of the selected monthly cell phone bill being less than $95 is: