PROBABILITY

R. H. Bruskin Associates Market Research found that 40% of Americans do not think that having a
college education is important to succeed in the business world. If a random sample of five Americans
is s selected, find these probabilities.
(a) Exactly two people will agree with that statement.

(b) At most three people will agree with that statement.

(c) At least two people will agree with that statement.

(d) Fewer than three people agree with that statement.

1. Calculate the probabilities that there will be 0,1,2,3,4 and 5 persons that agree.

P(5) = (0.4)^5*[5!/(0!*5!]= 0.4^5
= 0.01024
P(0) = (0.6)^5*[5!/(0!*5!]= (0.6)^5
= 0.07776
P(1) = (0.4)*(0.6)^4*[5!/(4!*1!)]
= 0.25920
P(2) = (0.4)^2*(0.6)^3*[5!/(3!*2!)]
= 0.34560
etc. Calculate P(3) and P(4) using the same formula, and use the results to answer the questions for (a) through (d).

For (a), the answer is P(2) = 0.3456
For (d), the answer is P(0) + P(1) + P(2) = 0.68256

posted by drwls
2. I= important
N=not important
P(i) = 60/100 = 3/5
P(N) = 2/5

a) P(2out of5 for I) = C(5,2)(3/5)^2 (2/5)^3 = 10(9/25)(8/125) = 144/625 or .2304

..

d) fewer than three agree --> 0outof5 or 1outof5 or 2outof5 will agree
= C(5,0)(3/5)^0 (2/5)^5 + C(5,1)(3/5)^1 (2/5)^4 + C(5,2)(3/5)^2 (2/5)^3
= 1(1)(32/3125 + 5(3/5)(16/625) + 10(9/25)(8/125)
= 32/3125 + 48/625 + 144/625
= 992/3125 or .31744

do b) and c) the same way

posted by Reiny
3. there are 4 dimes, 4 nickels,
and 2 quarters.

In how many possible ways can the selection be made so that
the value of the coins is at least 25 cents?

posted by Anonymous

Similar Questions

1. math

R. H. Bruskin Associates Market Research found that 30% of Americans do not think that having a college education is important to succeed in the business world. If a random sample of five Americans is s selected, find these
2. Maths

College Education and Business world success R. H. Bruskin Associates Market Research found that 40% of American do not think that having a college education is important to succeed in the business world. if a random sample of
3. Market Research

In the video, The Role of Market Research, Jeff Hawkins describes how marketing research did (and didnâ€™t) help him identify market opportunities and problems. Use Table 1.1 to suggest a category of marketing research that could
4. statistics

1. 35% of North Americans do not think that college education is a contributory factor to economic success. A random sample of seven North Americans is selected
5. Co-op

I have been given a cooperative education placement and career research assignment... Basically I have to do research of my career by giving its information, where I work research, What I do research, What I learned research,

Becoming a discerning consumer of research is something you can achieve by practicing good research skills and using your A. critical thinking B. education C. resources D. college library
7. economics

Over the last 30 years in the United States, the realprice of a college education (i.e., after adjusting for inflation) has increased by almost 70 percent. Over the same period, an increasing number of high school grad- uates have
8. basic research

We are conducting research about the inclination of the college students taking up Education as a curriculum. Now, we need to find theories behind this. Please help me find what is "Aptitude Theory"???
9. am i right? :/ ss

1. Why did African American urban communities develop? (Choose all that apply.) (3 points) African Americans overcame legal limitations placed on them and found solidarity in city communities.**** African Americans were placed in
10. english

Which of the following would most likely be an entry in a sentence outline? A. Education beyond high school versus education beyond college B. Education as a pathway C. Education as a tool D. Education can change a person's life.

More Similar Questions