Question
In: Statistics and Probability
2. Two hundred managers from various levels were randomly selected and interviewed regarding their concern about...
2. Two hundred managers from various levels were
randomly selected and interviewed regarding their concern about
environmental issues. The response of each person was tallied into
one of the three categories: No concern, some concern and great
concern. The results were:
Level of Management No Concern Some concern Great concern
Top Management 15 13 12
Middle Management 20 19 21
Supervisor 7 7 6
Group Leader 28 21 31
Use the .01 significance level to determine whether there is a
relationship between management level and environmental concern
through Chi Square
Solutions
orchestra answered 2 years agoRelated Solutions
2. Two hundred managers from various levels were randomly selected and interviewed regarding their concern about...
2. Two hundred managers from various levels were
randomly selected and interviewed regarding their concern about
environmental issues. The response of each person was tallied into
one of the three categories: No concern, some concern and great
concern. The results were: Level of Management No Concern Some
concern Great concern Top Management 15 13 12 Middle Management 20
19 21 Supervisor 776 Group Leader 28 21 31 Use the .01 significance
level to determine whether there is a relationship between...
One hundred randomly selected subjects from 51,048 subjects were interviewed as a part of the California...
One hundred randomly selected subjects from 51,048 subjects were
interviewed as a part of the California Health Interview Survey.
The table below was constructed from the responses of the 100
subjects. Use a 0.05 significance level to test the claim that for
California adults, exercise is independent of gender.
Have you exercised vigorously in the last 7 days?
YES
NO
MALE
13
34
FEMALE
15
38
4. One hundred students were interviewed. Forty–two are Monthly Active Users (MAU) of Facebook (F), and...
4. One hundred students were interviewed. Forty–two are Monthly
Active Users (MAU) of Facebook (F), and sixty–five are MAU of
Snapchat(S). Thirty–four are MAU of both Facebook and Snapchat. One
of the100 students is randomly selected, all 100 students having
the same probability of selection (1/100).
(a) What is the probability that the student is an MAU of
Facebook?
(b) What is the probability that the student is an MAU of
Facebook given that the student is an MAU of...
an advertising study interviewed six randomly selected people in each of two cities, recording each person's...
an advertising study interviewed six randomly selected people in
each of two cities, recording each person's level of preference for
a new product:
milwaukee
green bay
3
4
2
5
1
4
1
3
3
2
2
4
a) is this a paired or unpaired two sample problem?
b) find the average preference level for each city.
c) find the standard error of the difference between these
average preference levels (these are small samples)
d) find the 95% two-sided confidence...
Five hundred employees were selected from a city’s large private companies and they were asked whether...
Five hundred employees were selected from a city’s large private
companies and they were asked whether or not they have any
retirement benefits provided by their companies. Based on this
information, the following two-way classification table was
prepared Have Retirement Benefits
Yes. No
Men 225 75
Women 150 50
If one employee is selected at random from these 500 employees,
find the probability that this employee:
i. is a woman,
ii. has retirement benefits,
iii. has retirement benefits given the...
A committee will be formed with 4 managers and 3 engineers selected randomly without replacement from...
A committee will be formed with 4 managers and 3 engineers
selected randomly without replacement from 11 managers and 16
engineers.
What is the conditional probability that engineer Al is on the
committee given that engineer Jane is on the committee?
Round your answer to three decimal places (e.g. 98.765).
Would the answer be ((3/16)x(2/15))/(3/16) ---> (2/15)
----> .1333333
Nine students were randomly selected from a population of 1000 students and they were given a...
Nine students were randomly selected from a population of 1000
students and they were given a math test. Test results are:
95 90 89 85 76
73 92 90 72 What
is the 84% confidence interval for the population mean score on the
math tests?
a) Do you need any assumptions? If yes, make the assumption.
b) Name the interval
c) 84% CI is
Scenario 2: Car crashes ~ Randomly selected deaths from car crashed were obtained and the results...
Scenario 2: Car crashes ~ Randomly selected
deaths from car crashed were obtained and the results are shown in
the table below:
Day
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Fatalities
132
108
95
99
115
132
138
State officials wonder if car crash fatalities occur with
unequal frequency on different days of the week. They represent
this research question in terms of two competing hypotheses:
H0: Car crashes occur with equal frequency throughout the week
and that any uneven...
Fifteen people were randomly selected from the population and randomly assigned to 1 of 3 experimental...
Fifteen people were randomly selected from the population and
randomly assigned to 1 of 3 experimental groups. Group 3 was
included as the control group and did not receive any treatment.
Use the following data set to answer the questions.
Group 1
Group 2
Group 3
21
25
32
53
54
41
44
26
86
72
32
75
Is there a significant difference (α=0.05) between at
least two groups?
A.
Yes
B.
No
C.
Not possible to determine
D.
Alpha...
Independent random samples of 180 observations were randomly selected from binomial populations 1 and 2, respectively....
Independent random samples of 180 observations were randomly
selected from binomial populations 1 and 2, respectively. Sample 1
had 104 successes, and sample 2 had 113 successes.
Suppose that, for practical reasons, you know that
p1
cannot be larger than
p2.
Test the appropriate hypothesis using α = 0.10.
vH0: (p1 − p2) = 0 versus
Ha: (p1 − p2) < 0
Find the test statistic. (Round your answer to two decimal
places.)
z =
Find the rejection region. (Round...
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