25. A recent survey found that 82% of college graduates believe their degree was a good investment (cnbc.com, February 2 2020). Suppose a random sample of 100 college graduates is taken. a. What is the expected value and the standard error for the sampling distribution of the sample proportion? b. What is the probability that the sample proportion is less than 0.80? c. What is the probability that the sample proportion is within ± 0.02 of the population proportion?
25. A recent survey found that 82% of college graduates believe their degree was a good investment (cnbc.com, February 2 2020). Suppose a random sample of 100 college graduates is taken. a. What is the expected value and the standard error for the sampling distribution of the sample proportion? b. What is the probability that the sample proportion is less than 0.80? c. What is the probability that the sample proportion is within ± 0.02 of the population proportion?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question number 25
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24
2305- Business Statis X
Exercises 7.3
Content
Ohttps://prod.reader-ui.prod.mheducation.com/epub/sn_4893/data-uuid-9e3551b5c8f84659b5e77c87cacabf47
23. A rangOM sampie OT SiZe n= 200 Is taken trom a population with a population proportion p= 0.75.
a. Calculate the expected value and the standard error for the sampling distribution of the sample proportion.
b. What is the probability that the sample proportion is between 0.70 and 0.80?
c. What is the probability that the sample proportion is less than 0.70?
Applications
24. According to new research, 26% of Americans are (almost) always online (bigthink.com, March 20, 2018).
a. What is the probability that fewer than 60 of 200 Americans are always online?
b. What is the probability that more than 150 of 200 Americans are not always online?
25. A recent survey found that 82% of college graduates believe their degree was a good investment (cnbc.com, February 27,
2020). Suppose a random sample of 100 college graduates is taken.
a. What is the expected value and the standard error for the sampling distribution of the sample proportion?
b. What is the probability that the sample proportion is less than 0.80?
c. What is the probability that the sample proportion is within ± 0.02 of the population proportion?
26. One-fifth of Britains are not using the internet (bbc.com, September 9, 2019).
a. What is the expected value and the standard error for the sampling distribution of the sample proportion based on a
sample of 200 Britains. Is it appropriate to use the normal distribution approximation for the sample proportion? Explain.
b. What is the probability that more than 25% of Britains in the sample are not using the internet?
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Transcribed Image Text:00
24
2305- Business Statis X
Exercises 7.3
Content
Ohttps://prod.reader-ui.prod.mheducation.com/epub/sn_4893/data-uuid-9e3551b5c8f84659b5e77c87cacabf47
23. A rangOM sampie OT SiZe n= 200 Is taken trom a population with a population proportion p= 0.75.
a. Calculate the expected value and the standard error for the sampling distribution of the sample proportion.
b. What is the probability that the sample proportion is between 0.70 and 0.80?
c. What is the probability that the sample proportion is less than 0.70?
Applications
24. According to new research, 26% of Americans are (almost) always online (bigthink.com, March 20, 2018).
a. What is the probability that fewer than 60 of 200 Americans are always online?
b. What is the probability that more than 150 of 200 Americans are not always online?
25. A recent survey found that 82% of college graduates believe their degree was a good investment (cnbc.com, February 27,
2020). Suppose a random sample of 100 college graduates is taken.
a. What is the expected value and the standard error for the sampling distribution of the sample proportion?
b. What is the probability that the sample proportion is less than 0.80?
c. What is the probability that the sample proportion is within ± 0.02 of the population proportion?
26. One-fifth of Britains are not using the internet (bbc.com, September 9, 2019).
a. What is the expected value and the standard error for the sampling distribution of the sample proportion based on a
sample of 200 Britains. Is it appropriate to use the normal distribution approximation for the sample proportion? Explain.
b. What is the probability that more than 25% of Britains in the sample are not using the internet?
ere to search
近
83°F Mostly cloudy ^ @
Ol]
I14
f11
f12
海
DDI
delete
144
7.
->
backspace
D.
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