Question

In order to collect opinions from employees of a company about a change of organizational benefits, a random sample of 250 employees is taken and 185 of them support the change. Construct a 95% confidence interval for the proportion of all employees who support the change. Interpret your results.

Answer #1

Of 245 employees selected randomly from one company, 12.11% of
them commute by carpooling. a. Construct a 90% confidence interval
for the true percentage of all employees of the company who
carpool. b. Interpret your confidence interval in the context of
the problem. c. What is the margin of error?

A polling company conducts an annual poll of adults about
political opinions. The survey asked a random sample of 2354 adults
whether they think things in the country are going in the right
direction or in the wrong direction. 62% said that things were
going in the wrong direction. Complete parts a and b below.
a) Calculate the margin of error for the proportion of all
adults who think things are going in the wrong direction for 95%
confidence.

A polling company conducts an annual poll of adults about
political opinions. The survey asked a random sample of 314 adults
whether they think things in the country are going in the right
direction or in the wrong direction. 51% said that things were
going in the wrong direction. Calculate the margin of error for the
proportion of all adults who think things are going in the wrong
direction for 95% confidence. (Use z*=1.96) Round your answer to 4
decimal...

A consultant hired to assess the company's organizational
culture finds that only 15% of employees are open to new ideas and
approaches toward their work. Consequently the company conducts a
program for employees in order to reinforce the new corporate
philosophy culture of innovativeness and change. Based on data
collected after the program, the 95% confidence interval for the
proportion of all employees open to new ideas is 18% to 22%. What
should the company conclude? I. The null hypothesis...

1. For a company whose total number of employees is 100, we
collect data from 7 employees ,5.2, 4.1, 10, 6.8, 3.8, 8.0, and
8.3.
Using these data, write down the upper bound of the 99% CI for
population mean. Assume that these data are from a normal
distribution.
Please provide answer with 2 decimal points.
2. From a sample of size 250, number of females is 173. What is
the point estimate of population proportion?
Provide an answer with...

We survey 1,600 people on their opinions about state tax policy
in a given state. 20% of the survey participants support an
increase in property tax.We want to examine the population
proportion of public opinions using this sample proportion.
a. Calculate the 95% confidence interval for the survey
participants supporting an increase in property tax AND interpret
the interval
b. In a follow up survey, which we are able to find 625 people
(survey participants in the second survey is...

A random sample of 121 NKU students was taken to test
the proportion of students who had attended a Reds game in
2015.
95% confidence interval results:
Variable
Count
Total
Sample Prop.
Std. Err.
L. Limit
U. Limit
Reds
65
121
0.53719008
0.045328634
0.44834759
0.62603257
1. Verify that the conditions are met to construct a 95%
confidence interval for the proportion of NKU students who attended
a Reds game in 2015.
2. Construct a 95% confidence interval:
3. Interpret the...

Show all work. Check your work with a calculator.
Researchers are interested in understanding the weekend
spending habits of college students. A simple random sample of 1500
college students is taken from universities across the United
States. The average amount of money spent on the weekends was $95
with a standard deviation of $185. Construct a 95% confidence
interval for the spending habits of college students on the
weekends. Interpret your results. Round to the nearest
hundredths.
Researchers are interested...

The employee benefits manager of a medium size business would
like to estimate the proportion of full-time employees who prefer
adopting plan A of three available health care plans in the coming
annual enrollment period. A reliable frame of the company’s
employees and their tentative health care preferences are
available. Using Excel, the manager chose a random sample of size
50 from the frame. There were 17 employees in the sample who
preferred plan A. Construct a 99% confidence interval...

A random sample of 100 employees at a company shows that 62 are
female. Form a 90% confidence interval for the proportion of all
employees who are female. The interval is 0.62 what
margin of error? Round your answer to 3 decimal places.

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