(5%)1. A pollster selected 4 of 7 available people. How many
different groups of 4 are possible?
10%2. Your firm has a contract to make 2000 staff uniforms for a
fast food retailer. The heights of the staff are normally distributed
with a mean of 70 inche
CHAPTER 11
ANALYSIS OF VARIANCE
1.
9.01 from Appendix G
2.
9.78
3.
Reject Ho if F > 10.5, where df in numerator are 7 and 5 in the denominator.
s12 (10) 2
F = 2.04, found by: F = 2 = 2 =2.04
s2
(7)
Do not reject Ho. There is no difference in the variation
CHAPTER 10
TWO SAMPLE TESTS OF HYPOTHESIS
1.
a.
b.
c.
d.
e.
2.
a.
b.
c.
d.
e.
Two-tailed test
Reject Ho if z < 2.05 or z > 2.05
102 99
z=
2.59, found by
52 6 2
+
40 50
Reject Ho and accept H1
p = 0.0096, found by 2(0.5000 0.4952)
One-tailed test
Reject Ho
CHAPTER 13
MULTIPLE REGRESSION AND CORRELATION ANALYSIS
1.
a.
b.
c.
Multiple regression equation
the Y-intercept
$374,748 found by Y = 64,100 + 0.394(796,000) + 9.6(6940) 11,600(6.0)
2.
a.
b.
c.
d.
e.
Multiple regression equation
One dependent, four indep
PART I
Part I
SAMPLE SYLLABUS
Basic Statistics for Business and Economics is designed to provide coverage of the basic
techniques of statistics whether the text is used on the quarter or semester system. The
text is designed for flexibility. For example,
CHAPTER 12
LINEAR REGRESSION AND CORRELATION
1.
X =28
r=
Y = 29
5(173) - (28)(29)
X 2 = 186
Y = 85
8(378) - (39)(85)
X 2 = 211
XY =173
Y 2 = 175
=0.75
[5(186) - (28) 2 ][5(175) - (29) 2 ]
The 0.75 coefficient indicates a rather strong positive corr
CHAPTER 14
CHI-SQUARE APPLICATIONS FOR NOMINAL DATA
1.
a.
b.
3
7.815
2.
a.
b.
5
15.086
3.
a.
Reject Ho if 2 > 5.991
(10 20) 2 (20 20) 2 ( 30 20) 2
2
10.0
20
20
20
Reject Ho. The proportions are not equal.
b.
c.
4.
a.
b.
c.
Reject Ho if 2 > 7.815
(10 20)
TABLE OF CONTENTS
Part I:
Syllabus.2
Part II:
Chapter
1
Answers to all exercises in each chapter.5
What is Statistics?.6
2
Describing Data: Frequency Distributions and Graphic Presentation.8
3
Describing Data: Numerical Measures.27
4
A Survey of Probabili
2/7/2015
Print Test
PRINTABLE VERSION
Quiz 4
You scored 100 out of 100
Question 1
Your answer is CORRECT.
Find A given that the function,
, is continuous at 4.
cfw_
a)
4
b)
6
c)
2
d)
7
e)
5
Question 2
Your answer is CORRECT.
Give the values of A and B for
CHAPTER 9
ONE SAMPLE TESTS OF A HYPOTHESIS
1.
a.
b
c.
d.
e.
2.
a.
b.
c.
Two-tailed
Reject Ho and accept H1 when z does not fall in the region from 1.96 and 1.96
49 50
1.2, found by z
(5 / 36)
Fail to reject Ho
p = 0.2302, found by 2(0.5000 0.3849). A 23.
CHAPTER 8
ESTIMATION AND CONFIDENCE INTERVALS
(
)
1.
51.314 and 58.686, found by 55 2.58 10 / 49
2.
38.911 and 41.089, found by 40 1.96 5/ 81
3.
a.
b.
c.
4.
1.44
5.
a.
b.
$20. It is our best estimate of the population mean.
$18.60 and $21.40, found by $20
CHAPTER 7
SAMLING METHODS AND THE CENTRAL LIMIT THEOREM
1.
a.
b.
c.
d.
303 Louisiana, 5155 S. Main, 3501 Monroe, 2652 W. Central
Answers will vary
630 Dixie Hwy, 835 S. McCord Rd., 4624 Woodville Rd.
Answers will vary
2.
a.
Childrens Hospital Medical Cent
CHAPTER 11
ANALYSIS OF VARIANCE
Part I
1. A
6. A
2.
7.
C
A
3. B
8. A
4. D
9. C
5. D
10. C
Part II
11. a.
c.
2
H 0 : 1 2
2
F
2
H1: 1 2
2
b. Reject H0 if F > 2.59
1252
.
7.716
0.452
d. H0 is rejected. There is more variation in the shipments by Brown Truck.
CHAPTER 3
DESCRIBING DATA: NUMERICAL MEASURES
1.
5.4 found by 27/5
2.
55 found by 33/6
.
3.
a.
b.
Mean = 7.0, found by 28/4
(5 7) (9 7) ( 4 7) (10 7) 0
4.
a.
b.
4.2 found by 21/5
(1.3 4.2) ( 7.0 4.2) (3.6 4.2) ( 4.1 4.2) (5.0 4.2) 0
5.
14.58, found by 4
PART III
STUDY GUIDE ASSIGNMENT ANSWERS
145
Study Guide Assignment Answers
CHAPTER 1
WHAT IS STATISTICS?
Part I
1.
2.
3.
4.
5.
Part II
Part III
Quantitative
Qualitative
Quantitative
Quantitative
Qualitative
6.
7.
8.
9.
10.
Discrete
Continuous
Discrete
Con
EXERCISE ANSWER SECTION
CHAPTER 2
DESCRIBING DATA: FREQUENCY DISTRIBUTIONS AND GRAPHIC
PRESENTATION
Exercise 2.1
Frequency distribution:
Miles per Gallon
15 up to 20
20 up to 25
25 up to 30
30 up to 35
35 up to 40
Tallies
Number of
Engines
/
/
/ /
/
/
2
4
CHAPTER 4
A SURVEY OF PROBABILITY CONCEPTS
1.
Outcome
1
2
3
4
1
A
A
F
F
2
A
F
A
F
2.
Outcome
1
2
3
4
5
6
7
8
9
1
A
A
A
R
R
R
S
S
S
2
A
R
S
A
R
S
A
R
S
Chapter 4
42
3.
a.
b.
0.176 found by 6/34
Empirical
4.
a.
b.
0.40, found by 2/5
Classical
5.
a.
b.
c.
d.
CHAPTER 6
THE NORMAL PROBABILITY DISTRIBUTION
1.
The actual shape of a normal distribution depends on its mean and standard deviation. Thus,
there is a normal distribution, and an accompanying normal curve, for a mean of 7 and a standard
deviation of 2. T
CHAPTER 1
WHAT IS STATISTICS?
1.
a.
b.
c.
d.
e.
f.
Interval
Ratio
Interval
Nominal
Ordinal
Ratio
2.
a.
b.
c.
d.
Ratio
Nominal
Ratio
Ratio
3.
Answers will vary
4.
a.
b.
c.
d.
Sample
Population
Population
Sample
5. Qualitative data is not numerical, whereas