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College Algebra

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter9: Sequences, Probability And Counting Theory

Section9.7: Probability

Problem 60SE: Use this data for the exercises that follow: In 2013, there were roughly 317 million citizens in the...

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5. The data shows the company's probability of earning a projected profit for one year.
Solve for the average projected profit and the standard deviated.
Profit in Millions
Probability in Percent
5.6
20%
4.7
15%
8.2
18%
3.3
35%
10.0
12%

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Use this data for the exercises that follow: In 2013, there were roughly 317 million citizens in the United States, and about 40 million were elderly (aged 65 and over).[34] 60. It is predicted that by 2030, one in five U.S. citizens will be elderly. How much greater will the chances of meeting an elderly person be at that time? What policy changes do you foresee if these statistics hold true?
According to Deloitte, through January 25,2006, the majority of companies reporting profits had beaten estimates. Now suppose that for the 4th quarter of 2012, 170 of a random sample of 280 companies reported profits that had beaten estimates. Does the data indicate the proportion of companies in the 4th quarter of 2012 that beat estimates is greater than 56% at α=0.05?
In general,_____% of the values in a data set lie at or below the 94th percential. _______% of the values in a data set lie at or above the 90th percentile... if a sample consists of 800 test scores,___ of them would be at or below 40th percential, if a sample consists of 800 test scores,____ of then would be at or above the 58th percentile.

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