Question
In: Statistics and Probability
Question 4-6: A corporation randomly selects 150 salespeople and finds that 99 salespeople would like to...
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Question 4-6: A corporation randomly selects 150 salespeople and finds that 99 salespeople would like to take a self-improvement course. The firm did a similar study 10 years ago in which 96 salespeople out of a random sample of 160 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let p 1 and p 2 represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study, respectively.
Which equation should be used to compute the value of the test statistic ?A. eq 10.5
B. eq 10.9
C. eq 10.7
D. eq 10.16
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The company tests to determine at the 0.05 level whether the population proportion has changed from the previous study. Which of the following is most correct if the test statistic is 1.093?
A. Reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has increased over the intervening 10 years.
B. Fail to reject the null hypothesis, there is not enough evidence to conclude that the proportion of employees who are interested in a self-improvement course has not changed over the intervening 10 years.
C. Fail to reject the null hypothesis, there is not enough evidence to conclude that the proportion of employees who are interested in a self-improvement course has changed over the intervening 10 years.
D. Reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has changed over the intervening 10 years.
Solutions
orchestra answered 1 year agoRelated Solutions
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-...
A corporation randomly selects 150 salespeople and finds that
66% who have never taken a self- improvement course would like to
do so. The firm did a similar study 10 years ago and found that 70%
of a random sample of 160salespeople wanted a self-improvement
course. The groups are assumed to be independent random samples.
Let π1and π2 represent the true proportion of
workers who would like to attend a self-improvement course in the
recent study and the past study, respectively....
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self...
A corporation randomly selects 150 salespeople and finds that
66% who have never taken a self improvement course would like such
a course. The firm did a similar study 10 years ago in which 60% of
a random sample of 160 salespeople wanted a self-improvement
course. The groups are assumed to be independent random samples.
Let pi1 and pi2 represent the true proportion of workers who would
like to attend a self-improvement course in the recent study and
the past...
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement...
A corporation randomly selects 150 salespeople and finds that
66% who have never taken a self-improvement course would like such
a course. The firm did a similar study 10 years ago in which 60% of
a random sample of 160 salespeople wanted a self-improvement
course. The groups are assumed to be independent random samples.
Let π1 and π2represent the true proportion of
workers who would like to attend a self-improvement course in the
recent study and the past study, respectively....
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement...
A corporation randomly selects 150 salespeople and finds that
66% who have never taken a self-improvement course would like such
a course. The firm did a similar study 10 years ago in which 60%
of a random sample of 160 salespeople wanted a self-improvement
course. The groups are assumed to be independent random samples.
Let
pi 1π1
and
pi 2π2
represent the true proportion of workers who would like to
attend a self-improvement course in the recent study and the...
corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement course...
corporation randomly selects 150 salespeople and finds that 66%
who have never taken a self-improvement course would like such a
course. The firm did a similar study 10 years ago in which 60% of a
random sample of 160 salespeople wanted a self-improvement course.
The groups are assumed to be independent random samples. Let
?1 and ?2 represent the true
proportion of workers who would like to attend a self-improvement
course in the recent study and the past study, respectively....
1. A statistics student takes a poll five randomly selected coffee shops, then randomly selects 6...
1. A statistics student takes a poll five randomly selected
coffee shops, then randomly selects 6 customers from each coffee
shop to find out if they support the President’s decision for
declaring the construction of a southern border wall a national
emergency.
Why wouldnʹt this sample be representative of the entire US
voting population?
To test the belief that sons are taller than their fathers, a student randomly selects 6...
To test the belief that sons are taller than their fathers, a
student randomly selects 6 fathers who have adult male children.
She records the height of both the father and son in inches and
obtains the accompanying data. Are sons taller than their fathers?
Use the alpha equals 0.1 level of significance. Note that a normal
probability plot and boxplot of the data indicate that the
differences are approximately normally distributed with no
outliers.
Observation
1
2
3
4...
To test the belief that sons are taller than their fathers, a student randomly selects 6...
To test the belief that sons are taller than their fathers, a
student randomly selects 6 fathers who have adult male children.
She records the height of both the father and son in inches and
obtains the accompanying data. Are sons taller than their fathers?
Use the alpha equals 0.1 level of significance. Note that a normal
probability plot and boxplot of the data indicate that the
differences are approximately normally distributed with no
outliers.
Observation
1
2
3
4...
To test the belief that sons are taller than their fathers, a student randomly selects 6...
To test the belief that sons are taller than their fathers, a
student randomly selects 6 fathers who have adult male children.
She records the height of both the father and son in inches and
obtains the accompanying data. Are sons taller than their fathers?
Use the α=0.1 level of significance. Note that a normal probability
plot and boxplot of the data indicate that the differences are
approximately normally distributed with no outliers.
Observation
1
2
3
4
5
6...
A researcher randomly selects 6 fathers who have adult sons and records the fathers' and sons'...
A researcher randomly selects 6 fathers who have adult sons and
records the fathers' and sons' heights to obtain the data shown
in the table below. Test the claim that sons are taller than their
fathers at the alpha equals 0.10α=0.10 level of significance. The
normal probability plot and boxplot indicate that the differences
are approximately normally distributed with no outliers so the use
of a paired t-test is reasonable
67.5
72.9
68.4
71.2
67.7
66.8
71.1
71.3
67.6
74.7...
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