SOLUTION MANUAL FOR Mathematical Statistics with Applications
7th Edition by Dennis Wackerly, William Mendenhall, Richard
Scheaffer|| ALL CHAPTERS ||COMPLETE GUIDE
,Chapter 1: What Is Statistics?
1.1 A. Population: All Generation X Age US Citizens (Specifically, Assign A ‘1’ To
Those Who Want To Start Their Own Business And A ‘0’ To Those Who Do Not, So
That The Population Is The Set Of 1’s And 0’s). Objective: To Estimate The
Proportion Of Generation X Age US Citizens Who Want To Start Their Own
Business.
b. Population: All Healthy Adults In The US. Objective: To Estimate The True Mean
Body Temperature
c. Population: Single Family Dwelling Units In The City. Objective: To Estimate
The True Mean Water Consumption
d. Population: All Tires Manufactured By The Company For The Specific Year.
Objective: To Estimate The Proportion Of Tires With Unsafe Tread.
e. Population: All Adult Residents Of The Particular State. Objective: To
Estimate The Proportion Who Favor A Unicameral Legislature.
f. Population: Times Until Recurrence For All People Who Have Had A Particular
Disease. Objective: To Estimate The True Average Time Until Recurrence.
g. Population: Lifetime Measurements For All Resistors Of This Type. Objective: To
Estimate The True Mean Lifetime (In Hours).
Histogram Of Wind
0.30
0.25
0.20
Density
0.15
0.10
0.05
0.00
5 10 15 20 25 30 35
Wind
1.2 A. This Histogram Is Above.
b. Yes, It Is Quite Windy
There.
c. 11/45, Or Approx. 24.4%
d. It Is Not Especially Windy In The Overall Sample.
,1
, 2 Chapter 1: What Is Statistics?
Instructor’s Solutions Manual
Histogram Of U235
0.25
0.20
0.15
Density
0.10
0.05
0.00
0 2 4 6 8 10 12
U235
1.3 The Histogram Is
Above.
Histogram Of Stocks
0.30
0.25
0.20
Density
0.15
0.10
0.05
0.00
2 4 6 8 10 12
Stocks
1.4 A. The Histogram Is
Above.
B. 18/40 = 45%
C. 29/40 = 72.5%
1.5 A. The Categories With The Largest Grouping Of Students Are 2.45 To 2.65 And 2.65
To 2.85. (Both Have 7 Students).
B. 7/30
C. 7/30 + 3/30 + 3/30 + 3/30 = 16/30
1.6 A. The Modal Category Is 2 (Quarts Of Milk). About 36% (9 People) Of The 25 Are
In This Category.
B. .2 + .12 + .04 = .36
C. Note That 8% Purchased 0 While 4% Purchased 5. Thus, 1 – .08 – .04 = .88 Purchased
Between 1 And 4 Quarts.
7th Edition by Dennis Wackerly, William Mendenhall, Richard
Scheaffer|| ALL CHAPTERS ||COMPLETE GUIDE
,Chapter 1: What Is Statistics?
1.1 A. Population: All Generation X Age US Citizens (Specifically, Assign A ‘1’ To
Those Who Want To Start Their Own Business And A ‘0’ To Those Who Do Not, So
That The Population Is The Set Of 1’s And 0’s). Objective: To Estimate The
Proportion Of Generation X Age US Citizens Who Want To Start Their Own
Business.
b. Population: All Healthy Adults In The US. Objective: To Estimate The True Mean
Body Temperature
c. Population: Single Family Dwelling Units In The City. Objective: To Estimate
The True Mean Water Consumption
d. Population: All Tires Manufactured By The Company For The Specific Year.
Objective: To Estimate The Proportion Of Tires With Unsafe Tread.
e. Population: All Adult Residents Of The Particular State. Objective: To
Estimate The Proportion Who Favor A Unicameral Legislature.
f. Population: Times Until Recurrence For All People Who Have Had A Particular
Disease. Objective: To Estimate The True Average Time Until Recurrence.
g. Population: Lifetime Measurements For All Resistors Of This Type. Objective: To
Estimate The True Mean Lifetime (In Hours).
Histogram Of Wind
0.30
0.25
0.20
Density
0.15
0.10
0.05
0.00
5 10 15 20 25 30 35
Wind
1.2 A. This Histogram Is Above.
b. Yes, It Is Quite Windy
There.
c. 11/45, Or Approx. 24.4%
d. It Is Not Especially Windy In The Overall Sample.
,1
, 2 Chapter 1: What Is Statistics?
Instructor’s Solutions Manual
Histogram Of U235
0.25
0.20
0.15
Density
0.10
0.05
0.00
0 2 4 6 8 10 12
U235
1.3 The Histogram Is
Above.
Histogram Of Stocks
0.30
0.25
0.20
Density
0.15
0.10
0.05
0.00
2 4 6 8 10 12
Stocks
1.4 A. The Histogram Is
Above.
B. 18/40 = 45%
C. 29/40 = 72.5%
1.5 A. The Categories With The Largest Grouping Of Students Are 2.45 To 2.65 And 2.65
To 2.85. (Both Have 7 Students).
B. 7/30
C. 7/30 + 3/30 + 3/30 + 3/30 = 16/30
1.6 A. The Modal Category Is 2 (Quarts Of Milk). About 36% (9 People) Of The 25 Are
In This Category.
B. .2 + .12 + .04 = .36
C. Note That 8% Purchased 0 While 4% Purchased 5. Thus, 1 – .08 – .04 = .88 Purchased
Between 1 And 4 Quarts.
