Ch13
Question 1
1 out of 1 points
A sales manager for
an advertising
agency believes that
there is a
relationship between
the number of
contacts that a sales
person makes and
the amount of the
sales dollars earned.
A regression
analysis shows the
followin
Question 1
1 out of 1 points
In testing the
difference between
two population
proportions, we pool
the two sample
proportions to
estimate the
population
proportion.
Answer
Selected Answer:
Correct Answer:
Response
Feedback:
correct
AACSB: Communication Ab
Chapter 11, #61
Type your answer and paste your Minitab graphs here (if applicable).
a.
1iswithoutpool,2iswithpool
Hypotheses:
H0:1=2
Ha:12(Claim)
CriticalValue:
At =0.05,Foratwotailedtest,z(crit)=1.96
Two-Sample T-Test and CI: Price, Pool
Two-sample T f
Chapter 8, #47 (2 points):
Type your answer and paste your Minitab graphs here (if applicable).
a. b.
Descriptive Statistics: Attendance
Variable
Attendance
Total
Count
30
Mean
2.448
Chapter 13, #63 (9 points):
Type your answer here.
a.
Fi t t e dLi ne Pl ot
Wins = 67. 12 + 0. 1568Salar y
S
R Sq
R Sq ( ad j )
100
W ins
90
80
70
60
50
75
100
125
Sa la r y
150
175
There is a relationship between the two variables.
b.
67.12 + 0.1568 *100
Question 1
1 out of 1 points
In a two-way
ANOVA with
interaction, a
significant
interaction term
indicates that
Answer
Selected Answer:
both factors are unrelated.
Correct Answer:
both factors have a combined effect on the response variable.
Response
Feed
Ch14
Question 1
1 out of 1 points
A multiple
regression model
includes the term,
(X1)(X2). If
hypothesis that the
term's regression
coefficient is NOT
rejected, what is a
valid conclusion?
Answer
Selected
Answer:
the effect of X
X
Correct Answer:
the effe
t-Test: Two-Sample Assuming Equal Variances
response response
Mean
15.5625 9.333333
Variance 26.52917
24
Observatio
16
9
Pooled Var 25.64946
Hypothesiz 6.22917
df
23
t Stat
-1.6E-006
P(T<=t) one0.499999
t Critical o 1.713872
P(T<=t) two0.999999
t Critical
Chapter 10, #67:
Type your answer and paste your Minitab graphs here (if applicable).
95% confidence Level (because the significance level is .05) To reject HO we need to find a p
less than .05. This is related to alpha
One-Sample T: Salary
Test of mu = 8
Chapter 9, #69:
Type your answer and paste your Minitab graphs here (if applicable).
a.
Variable N mean Standard deviation standard error 95% confidence interval
Price
105 221.10
47.11
4.60
(211.99, 230.22)
221.10+/-(230.22-221.10)
95 times out of 100. Th
Chapter 12, #49 (3 points):
Type your answer here.
a.
Hypotheses:
Ho:
=H1:
H0: without pool = with pool
H1: without pool with pool
Test for Equal Variances: Price versus Pool
98% Bonferroni confidence intervals for standard deviations
Pool
0
1
N
67
38
Low
Chapter 2, #51
Type your answers here and paste figure(s) from Minitab when appropriate:
a. The data for selling price of homes clustered around a selling price of 180 up to 250 range.
b. The largest selling price is 345.3; the smallest selling price is 1
Name
Chapter 3, #87:
Type your answers here.
a1. Using Mean as the indicator or central tendency, the mean salary of the 30 teams is $88.5
mil. If we use median as the indicator of central tendency, the median salary of the teams is
$80.35 mil. Since the
Name:
Chapter 4, #45:
Type your answers and paste your Minitab graphs here.
a. There are 5 teams that are outliers: Loa Angeles Angels, Oakland As, Los Angeles
Dodgers, Chicago Cubs, Boston Red Sox
b. The NY Yankees are the outlier. They spent $50 million
Chapter 6, #71:
168.7 the mean number of HR 168.7/162 then multiplie it by 2 we get 2.07
Determining the mean of the interval: 168.07/162*2=2.07
Type your answer and paste your Minitab graphs here (if applicable).
a. 12.6% prob of 0 HR/game
b. 27% prob of
Chapter 7, #75
Type your answer and paste your Minitab graphs here (if applicable).
a. The cumulative probability for X= 3.5 is 934 therefore, 1- 9 will give us the probability of
more than X= 3.5. Thus, 0.066 is the probability of more than 3.5. The actu
Name
Instructor
Course
Date
A confidence interval gives an estimated range of values which is likely to include an unknown
population parameter, the estimated range being calculated from a given set of sample data (Valerie J.
Easton and John H. McColls St