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 eight are retired people? b. What is the probability that 10 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 2O 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 11 or more adults invested in mutual funds?

Q: or item numbers 17-20: A survey was conducted for Subic National School Grade 10 students to…

A:

Q: -4.5 O incre ased by 3.5? What is the dista nce betw een -4.5 and 3.5? Find the sum O of -4.5 and…

A: The solution to the 1st question: Given,           -4.5 increased by 3.5 Now,          -4.5 + 3.5 =…

Q: Question 1 Prove that the number of pairs (A, B) such that A C B C {1,2.n} is 3".

A: Let the set A is containing n elements then number of ways to pick r elements out of n elements is…

Q: Show that = n. mnZ

A: mZ = set of all integers which are divisible by m mnZ = set of all integers which are divisible by…

Q: 10. If GF = 15 and CG = 23, find CD.

A: The length of the side GF is 15. The length of the side CG is 23.

Q: Pr('green' | 4 or 6) b) Use a tree diagram and apply the multiplication principle to find the…

A: Conditional Probability : Probability of event A when given B has happened P(A|B)=P(A∩B)P(B)

Q: Another term for X is: A) An explanatory variable B) A right hand side variable C) A left hand side…

A: Let us consider, the equation as, Y=aX+b Here, the variable X lies on right hand side. Hence option…

Q: Find the probability of the given event. 49) Two fair dice are rolled. The sum of the numbers on the…

A:

Q: 3 4 슬.

A:

Q: 3 2 If A = use the Cayley-Hamilton theorem to determine A?. 5 1

A: We can solve this by using given information

Q: e. 3(v+ w)

A:

Q: 16 6in.I 9in. 24in. #16 * in.2 Your answer

A: Area of triangle =12(base×height)=12(b×h) Area of rectangle =length×width=l×w

Q: Prove the A.B = B.A.

A: To prove AB = BA.

Q: 4. What is P(4) ? a. 60 5. What is P(B) ? b. a. 60 b. eide d. 60 6. What is P(AUB)? b. 60 60 60 c. 1…

A: It is given that P(E1) = P(E2) = P(E3) = 10/60P(E4) = P(E5) = 3/60P(E6) = 4/60 and P(E7) =…

Q: Given that v = and w =. Find

A:

Q: Find the d. c. of from definition.

A: Introduction :

Q: G. iF themc1:58 then the mc GSP? S, 2. 3.

A: m∠1=58°

Q: Question 13 A furniture store is having a sale on sofas and you're going to buy one. The advertisers…

A:

Q: Suppose a, b e (0, ) and a b- a.

A: I hope that this solution will help you .Thankyou. Best regards.

Q: Q. 5. Show that "-C, 1+"C, =" C, . n-1

A:

Q: (c) Use the critical value approach and an a of 10% to test the hypothesis stated in part (a). What…

A: c) Compute the sample proportion by substituting x=89 and n=1000 using the formula: p⏞=xn p⏞=891000…

Q: 1. The times required by three workers to perform an assembly-line task were recorded on five…

A: Answer                         Group1           Group2            Group3…

Q: In a school of 450 students, 120 students are in DECA, 270 students are on sports teams, and 75…

A:

Q: can the assumption of the researcher be placed on Ha instead of Ho? ex. the assumption of the…

A: Here identifying which type of statement included in null and alternative

Q: A scientist drew a line graph of the average annual temperature in the United States between 1953…

A: Graph of temperature between 1953 to 1962.

Q: Let à . Find al.

A:

Q: question 3

A:

Q: 1/4 Question 2 (10 points) Match the questions in column A with the answers in column B. Answers are…

A:

Q: If the sets A, are independent and P(U, A,)=1 then P[A i.o.] = 1. %3D

A: Let {An}n=1∞ be an infinite event satisfying P(An)<1 for all n, then  P∪n=1∞An = 1 if and only if…

Q: EtY

A: Observe the given figure, coordinate of F is (0,3) coordinate of E is (0,9) coordinate of D is (3,…

Q: (a,b) is measurable.

A: Since intervals are always measurable therefore the given open interval (a,b) is measurable.

Q: Let A. B C+ Then b.1 AnB c A Ond An B CR

A: Note:- in given problem some points are missing you don't define any relation between R and A, B.…

Q: If P(A) = 0.5, P(B)= 0.4 and P(An B) = 0.2. Find P(B|A) %3D O a. 0.4 O b. 0.5 O c. 0.6 2 O d. 0.3

A: We have given that P(A)=0.5 ,P(B)=0.4 and P(A and B)=0.2 P(B/A)=P(A and B)/P(A)

Q: We are testing an effect of a potion that claimed to improve injured people's injuries with 80% of…

A: Let P denotes the number of people who improved after getting the drug. Since the number of people…

Q: A. H. show that Ea -AE

A:

Q: what would Z and MOE be ?

A: Here we have to identify the Critical value Z and and Margin of error MOE

Q: According to a 2021 survey of student loan debt incurred to finance undergraduate education, the…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: answer

A: