Question 1
6 out of 6 points
In a hearing test, subjects estimate the loudness (in decibels) of sound,
and the results are:
68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68
What is the mean?
Selected
Answer:
a.
7
0
Question 2
6 out of 6 points
In a statistic c
http:/www.comfsm.fm/~dleeling/statistics/excel.html
Excel formula's for statistics
Make sure you're testing for the correct information
Two types of hypotheses:
1
Null hypothesis (H0)
a
What you expect to happen
2
Alternate hypothesis (HaorH1)
a
Everythin
Home Work 2
Question 1
Mean
SD
Question 2
100
20
Mean
SD
Probability of Random
variable between them
0.99
Probability that a given
spark plug will last 37,500
miles or longer before
replacement
X
0.5
99.5
P(X)
0.995
0.005
Calculating the value of the two
5.14 a.
A 40(.50)15(.25) ( 20)(.25) $18.75 million
B 140(.20)15(.50)( 35)(.30) $25 million
b.
2A ( 40 18.75)2 (.5) (15 18.75)2 (.25) ( 20 18.75)2(.25) 604.6875
A 604 .6875 24.59
2B (140 25)2 (.2) (15 25)2 (.5) ( 35 25)2 (.3) 3775
B 3775 61.44
c.
V A
Debbie Kennedy, asst. product manager for Jade shampoo has received results of her first project at her
company. Her proposal was to replace the shampoos conventional twist-off cap with a more contemporary
dispenser cap. Consumer tests suggested that Jade
Carter Blakely, QA for the manufacturing division of Lorex Pharmaceuticals was given the
complex, analytical task to determine the ideal and optimal level to which each of the 10 ounce
bottles of Linatol should be filled up to, in order to reduce the incr
Summary of American Lawbook Corporation (A) and (B)
Ed Troy of The American Lawbook Corporation is faced with the daunting task of choosing one
out of the three publication proposals which would make it to the syllabus of American law
schools for the acad
Q1
SUMMARY OUTPUT
Regression Statistics
Multiple R
R Square
Adjusted R Square
Standard Error
Observations
0.580626
0.337126
0.273996
1.093858
24
ANOVA
df
Regression
Residual
Total
SS
MS
Coefficients
Standard Error t Stat
Intercept
Training
Location
F
2 12
n
mean
100
3.0
a.
Ho
Ha
equal
not equal
b.
type I error
type II error
3
3
The incorrect rejection of the null hypothesis of the diameter being 3 inches, when it falls in
Not rejecting the null hypothesis that the diameter is equal to 3 inches if it misses
A bank manager has developed a new system to reduce the time customers spend
peak business hours. Typical waiting times during peak business hours under the c
minutes. The bank manager hopes that the new system will lower typical waiting
to evaluate the n
x
0
1
p(x)
0.2
0.8
x
0
1
2
3
p(x)
0.25
0.45
0.2
0.1
mean
Variance
std
0.8
0.16
0.4
mean
Variance
std
1.15
0.8275
0.90967
x
-2
0
2
5
p(x)
0.1
0.3
0.4
0.2
mean
1.6
Variance
4.44
std
2.107131
b. The mean X of all means has probabilities which all equal to 1
Quick Links
Question 1
5 out of 5 points
Assuming a fixed sample size, as (Type I error) decreases, (Type II
error) _.
Selected
Answer:
a.
Increas
es
Question 2
5 out of 5 points
When testing a null hypothesis about a single population mean and the
popula