Question
In: Statistics and Probability
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.
Question : What is the value of the test statistic to use in evaluating the alternative hypothesis that there is a difference in the two population proportions using α = 0.10?
a) 4.335
b) 2.706
c) 0.274
d) 1.194
Solutions
orchestra answered 1 year agoRelated Solutions
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....
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...
Question 4-6: A corporation randomly selects 150 salespeople and finds that 99 salespeople would like to...
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,...
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...
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
α=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.
Observation
1
2
3
4
5
6
Height of father (in inches)...
A researcher wants to investigate the relationship between self-regulation and GPA. She randomly selects 200 undergraduate...
A researcher wants to investigate the relationship between
self-regulation and GPA. She randomly selects 200 undergraduate
students and asks them to complete a scale measuring
self-regulation (Self-control Schedule - SCS) and obtains their GPA
from university administrative records (with their consent). The
mean GPA is 2.9 with a standard deviation of 1.15. The mean for SCS
is 22 with a standard deviation of 24. The correlation between the
SCS and GPA is 0.40.
r = 0.40
MEAN Self-regulation (SCS)...
a. Your friend is a Psychology major who has never taken a course in Economics and...
a. Your friend is a Psychology major who has never taken a
course in Economics and asks
you to explain what the steady-state level of capital is. Explain
to your friend what this is
in the context of the Solow growth model.
b. Suppose that an economy is initially in a steady-state and that
some of the nation’s
capital stock is destroyed because of a natural disaster or a war.
Using the Solow growth
model, determine the long-run effects of...
According to government data, 66% of employed women have never been married. Rounding to 4 decimal...
According to government data, 66% of employed women have never
been married. Rounding to 4 decimal places, if 15 employed women
are randomly selected: a. What is the probability that exactly 2 of
them have never been married? b. That at most 2 of them have never
been married? c. That at least 13 of them have been married?
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