Hire Experts For Answers
Order NowRelated Study Services
 Homework Answers
 Coursework writing help
 Term paper writing help
 Writing Help
 Paper Writing Help
 Research paper help
 Thesis Help
 Dissertation Help
 Case study writing service
 Capstone Project Writing Help
 Lab report Writing
 Take my online class
 Take my online exam
 Do my test for me
 Do my homework
 Do my math homework
 Online Assignment Help
 Do my assignment
 Essay Writing Help
 Write my college essay
 Write my essay for me
DESCRIPTION
Posted
Modified
Viewed
22
Instructions: Answer all questions and show calculations where necessary. Type answers into this Word doc and email your completed exam to me by 8pm. Please shrink graphs. Good luck.
Part 1. Short Answer (type answers into this document).
1. Why is the standard normal table found in the back jacket of nearly every statistics book in print? How does the standard normal distribution compare with a “normal distribution”? (5 pts.)
Because It is used to find the probability that a statistic is observed below, above, or between values on the standard normal distribution, and it accurately describes the distribution of values for many natural phenomena.
All normal distributions, like the standard normal distribution, are unimodal and symmetrically distributed with a bellshaped curve. However, a normal distribution can take on any value as its mean and standard deviation. In the standard normal distribution, the mean and standard deviation are always fixed
2. Explain this: X⁓N(20, 6). (5 points)
3. What is the usefulness of the Empirical Rule? (5 pts.)
Empirical Rule: “68–95–99.7”
• 99.7% of data observed following a normal distribution lies within 3 standard deviations of the mean
o Most data (68%) fall within 1 standard deviation from the mean.
o Around 95% of values are within 2 standard deviations of the mean.
o Around 99.7% of values are within 3 standard deviations of the mean
4. The weight of West Virginia males is normally distributed with a mean of 196 pounds. Twentyfive percent of males weigh less than 174 pounds. Find the standard deviation. (5 points) hint: Z = (X*Xbar / s).
5. How can we use the notion of “degrees of freedom” in everyday life? (5 points)
One way is that degrees of freedom can describe business situations where management must make a decision that dictates the outcome of another variable.
Part 2. Computation
6. An airline examined jumbojet passengers to see if age was associated with seat choice. Fillin the crosstabs below. (25 pts.)
a. Complete the crosstabs table. Label fully.
First Class
Business Class
Coach Class
Seniors (65+)
12
56
144
Adults (1865)
15
61
181
Kids (117)
3
15
45
b. Find P(senior); find P(kid)
c. Find P(Bus Class and kid); find P(Coach class and Adult)
d. Find P(SeniorCoach); Find P(CoachSenior)
e. Are airline seats nominal, ordinal, interval or ratio level data? Explain in one sentence.
f. Put this table in Minitab and test the hypothesis that age is related to seat choice. Make sure to state the null and alternative hypotheses.
7. Open the attached Excel spreadsheet and paste the data into Minitab.
(25 points)
Light bulb burn times may follow a normal distribution. Find data in the column “Burn Hours.”
a. Find the mean and standard deviation of this sample.
b. Put the burn hours histogram here _____. Explain whether or not it’s a normal distribution. How did you make your determination?
c. Find the cutoff (in hrs.) for the lower quarter of light bulb burn times.
d. Find the range for the middle 50% of burn times.
e. Find the cutoff for the lowest 15% of burn times.
8. Interpreting the standard normal distribution. (12 points)
Attachments
Exam 2 MPA 625—Statistics Name:__________________
March, 2023 Instructor: Dr. Mark Wilson
Note: you can use your book and notes. Do not contact anybody in class during the test period.
Instructions: Answer all questions and show calculations where necessary. Type answers into this Word doc and email your completed exam to me by 8pm. Please shrink graphs. Good luck.
Part 1. Short Answer (type answers into this document).
1. Why is the standard normal table found in the back jacket of nearly every statistics book in print? How does the standard normal distribution compare with a “normal distribution”? (5 pts.)
2. Explain this: X⁓N(20, 6). (5 points)
3. What is the usefulness of the Empirical Rule? (5 pts.)
4. The weight of West Virginia males is normally distributed with a mean of 196 pounds. Twentyfive percent of males weigh less than 174 pounds. Find the standard deviation. (5 points) hint: Z = (X*Xbar / s).
5. How can we use the notion of “degrees of freedom” in everyday life? (5 points)
Part 2. Computation
6. An airline examined jumbojet passengers to see if age was associated with seat choice. Fillin the crosstabs below. (25 pts.)
a. Complete the crosstabs table. Label fully.
First Class
Business Class
Coach Class
Seniors (65+)
12
56
144
Adults (1865)
15
61
181
Kids (117)
3
15
45
b. Find P(senior); find P(kid)
c. Find P(Bus Class and kid); find P(Coach class and Adult)
d. Find P(SeniorCoach); Find P(CoachSenior)
e. Are airline seats nominal, ordinal, interval or ratio level data? Explain in one sentence.
f. Put this table in Minitab and test the hypothesis that age is related to seat choice. Make sure to state the null and alternative hypotheses.
7. Open the attached Excel spreadsheet and paste the data into Minitab.
(25 points)
Light bulb burn times may follow a normal distribution. Find data in the column “Burn Hours.”
a. Find the mean and standard deviation of this sample.
b. Put the burn hours histogram here _____. Explain whether or not it’s a normal distribution. How did you make your determination?
c. Find the cutoff (in hrs.) for the lower quarter of light bulb burn times.
d. Find the range for the middle 50% of burn times.
e. Find the cutoff for the lowest 15% of burn times.
8. Interpreting the standard normal distribution. (12 points)
Calculate the area left of 1.1.
Calculate the area from 0.6 to 1.8.
Use the Empirical Rule to estimate the area to the left of 1 added to the area to the right of 2.
1
1
Exam 2
MPA 625
—
Statistics
Name:__________________
M
arch
, 202
3
Instructor: Dr. Mark Wilson
N
ote
:
you can use your book and notes.
D
o not contact anybody in class during the
test period.
Instructions: Answer all questions
and s
how calculation
s
where necessary.
Type
answers into this Word doc and e
mail your completed exam to me by
8pm
.
Please
shrink graphs.
Good
luck.
Part 1. Short Answer
(type
answers into this document).
1.
W
hy is the standard normal table found in the back jacket of nearly every
statistics book in print
?
How does the standard normal distribution compare with
a “normal distribution”?
(
5
pts.)
2.
Explain this: X
?
N(
2
0, 6
).
(5
points)
3.
W
hat is the usefulness
of
the
E
mpirical
R
ule
?
(
5
pts.)
4.
The weight of West Virginia males is normal
ly distributed with a mean of 19
6
pounds. T
wenty

five percent of
males weigh less than 1
74
pounds.
Find
the
s
tandard
deviation
.
(5
points)
h
int
:
Z
=
(
X
*

X
bar / s
)
.
5.
H
ow can we use the notion of
“
degrees of freedom
”
in
every
day life
? (
5
points)
1
Exam 2 MPA 625—Statistics Name:__________________
March, 2023 Instructor: Dr. Mark Wilson
Note: you can use your book and notes. Do not contact anybody in class during the
test period.
Instructions: Answer all questions and show calculations where necessary. Type
answers into this Word doc and email your completed exam to me by 8pm. Please
shrink graphs. Good luck.
Part 1. Short Answer (type answers into this document).
1. Why is the standard normal table found in the back jacket of nearly every
statistics book in print? How does the standard normal distribution compare with
a “normal distribution”? (5 pts.)
2. Explain this: X?N(20, 6). (5 points)
3. What is the usefulness of the Empirical Rule? (5 pts.)
4. The weight of West Virginia males is normally distributed with a mean of 196
pounds. Twentyfive percent of males weigh less than 174 pounds. Find the
standard deviation. (5 points) hint: Z = (X*Xbar / s).
5. How can we use the notion of “degrees of freedom” in everyday life? (5 points)
Sheet1
Hours Measures the time 60W bulbs burn until failure
1215.79
1071.83
1231.25
1224.03
1145.04
1237.43
1141.86
1352.61
1044.33
1234.77
1114.9
1356.04
1256.22
1295.33
1243.79
1255.62
1263.61
1327.04
1370.65
1177.6
1130.55
1335.57
1160.07
1257.08
1329.73
1286.74
1155.73
1070.7
1271.07
1155.32
1273.69
1317.31
1150.15
1208.5
1314.87
1282.07
1276.57
1229.51
1300.3
1177.32
1160.95
1093.36
1135.16
1359.03
1184.25
1123.07
1319.46
1208.55
1149.76
1355.47
1240.46
1282.83
1223.81
1248.94
1267.17
1256
1341.08
1510.35
1256.53
1262.41
1187.32
1342.02
1346.65
1422.32
1166.29
1356.84
1235.8
1413.94
1244.2
1286.64
1130.44
1281.16
1247.88
1291.82
1225.07
1214.48
1227.56
1295.73
1296.05
1287.07
1210.13
1262.04
1238.68
1240.36
1358.89
1201.33
1319.96
1330.31
1200.4
1274.12
1255.55
1243.11
1267.78
1151.56
1203.85
1239.09
1263.95
1459.85
1108.45
1250.5
1215.79
1071.83
1231.25
1224.03
1145.04
1239.43
1181.86
1352.61
1044.33
1234.77
1111.49
1336.04
1256.22
1295.33
1243.79
1255.62
1270.61
1327.04
1340.65
1177.6
1130.55
1350.57
1170.07
1257.08
1329.73
1286.74
1155.73
1075.7
1271.07
1155.32
1273.69
1317.31
1150.15
1204.5
1314.87
1282.07
1276.57
1229.51
1310.3
1177.32
1160.95
1093.36
1135.16
1379.03
1184.25
1123.07
1319.46
1208.55
1169.76
1335.47
1240.46
1242.83
1223.81
1248.94
1267.17
1296
1341.08
1510.35
1256.53
1265.41
1187.32
1342.02
1336.65
1422.32
1176.29
1356.84
1235.8
1413.94
1240.2
1286.64
1130.44
1281.16
1247.88
1299.82
1225.07
1214.48
1227.56
1295.73
1296.05
1280.07
1210.13
1262.04
1238.68
1240.36
1358.89
1201.33
1319.96
1330.31
1220.4
1274.12
1255.55
1243.11
1267.78
1151.56
1203.85
1239.09
1263.95
1459.85
1108.45
1257.5
Explanations and Answers
0
No answers posted
Post your Answer  free or at a fee
NB: Post a homework question for free and get answers  free or paid homework help.
Get answers to: Statistics Homework Exam Preparation or similar questions only at Tutlance.
Related Questions
 Algebra 2 Math Quiz Trigonometric Ratios And Functions Exam
 Sampling Distributions And Confidence Intervals
 Sampling Distributions And Confidence Intervals
 Statistics Unit Exam: This Short Exam Will Assess Your Understanding About Hypothesis Tests
 These Are Statistics And Applied Statistics Problems
 These Are Statistics And Applied Statistics Problems
 These Are Statistics And Applied Statistics Problems
 Need Help With Discrete Mathematics Exam
 Statisical Methods And Programming In R
 Iq Test For Job Interview (Simple Math Logic/Brain Teaser)
 Work With A Categorical Variable From The Math 211 Student Survey Data Set
 Advanced Statistics Capstone Project
 Advanced Statistics Capstone Project
 Advanced Statistics Capstone Project
 Business Statistics Probability Distributions Test
 Module Two Assignment Applied Statistics
 Quantitive Statistics & Reasoning Exam
 Matlab Work
 How To Use Manova Statistical Test To Analyze A Survey Dataset
 Statistics And Probability Exam
 Need Someone To Give Me Answers Written From A Geometry Math Test
 Need Someone To Take 4 Tests And A Midterm For A Calc Class
 Need Someone To Take 4 Tests And A Midterm In Calc 1
 Bksb Math Test To Enter Degree (2030 Questions)
 Probability Assignment  Simulating An Experiment Of Rolling A Fair SixSided Die
 Probability Assignment  Simulating An Experiment Of Rolling A Fair SixSided Die
 Constructing A Line Parallel To Another After Drawing A Triangle Similar To The On Hive And Then Proving Things
 Algebra And Trigonometry Studying , Help
 Analyzing Dissertation Data Using Spss
 Statistical Methods To Determine Association Between Student Test Outcomes And Student Attitudes And Immigration Status
 How To Calculate Date Of Vaccine Seeding Using Erlang Distribution
 High School Mathematics Literacy
 Quiz For My Statistics Class.
 Precalculus Math Exam College Level
 Answer A Few Questions Related To Trigonometry And Logarithms For Online Grade 12 Advanced Functions Exam
 Answer A Few Questions Related To Trigonometry And Logarithms For Online Grade 12 Advanced Functions Exam
 Research Statistics Methods Ii
 Help With Taking Geometry Final
 Linear Algebra And Vector Geometry
 Advanced Quantitative Method (Statistics, Excel) Test 1
 Solving Economical Math Questions.
 Math In The Carpentry Field, Stairs And Applied Math
 Algebra And Trigonometry Studying , Help
 Need Help With Preparation Of Competency Statement For Chartered Statisticians
 Aleks Statistics Topics. Complete 90%. Thank You.
 Statistic Assignment  Hypothesis Testing
 Statistic Assignment  Hypothesis Testing: Your University Is Doing A Study On Student Behavior. Using The Data For Final_ Fall
 Statistic Assignment  Hypothesis Testing
 Maths And Stats , Mode, Median
 Anova On Excel Using Hypothesis Testing Procedure