Mathematics, 17.03.2020 04:59 tinklover1413
In a study by Peter D. Hart Research Associates for the Nasdaq Stock Market, it was determined that 20% of all stock investors are retired people. In addition, 40% of all U. S. adults invest in mutual funds. Suppose a random sample of 25 stock investors is taken. a. What is the probability that exactly six are retired people? b. What is the probability that 9 or more are retired people? c. How many retired people would you expect to find in a random sample of 25 stock investors? d. Suppose a random sample of 20 U. S. adults is taken. What is the probability that exactly eight adults invested in mutual funds? e. Suppose a random sample of 20 U. S. adults is taken. What is the probability that fewer than five adults invested in mutual funds? f. Suppose a random sample of 20 U. S. adults is taken. What is the probability that exactly one adult invested in mutual funds? g. Suppose a random sample of 20 U. S. adults is taken. What is the probability that 13 or more adults invested in mutual funds? h. For parts e–g, what exact number of adults would produce the highest probability? How does this compare to the expected number?
Answers: 3
Mathematics, 21.06.2019 16:00
The table shows values for functions f(x) and g(x) . x f(x)=3x g(x)=2x+1 −2 19 −3 −1 13 −1 0 1 1 1 3 3 2 9 5 what is the solution to f(x)=g(x) ? select each correct answer.
Answers: 1
Mathematics, 21.06.2019 17:20
The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6
Answers: 3
Mathematics, 21.06.2019 20:30
What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie
Answers: 2
In a study by Peter D. Hart Research Associates for the Nasdaq Stock Market, it was determined that...
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