1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
IRINA_888 [86]
3 years ago
11

A random sample of n people selected from a large population will be asked whether they have read a novel in the past year. Let

the random variable R represent the number of people from the sample who answer yes. The variance of random variable R is 6. Assume the responses are independent of each other. If the proportion of people from the population who read a novel in the past year is 0.40, which of the following is the best interpretation of random variable R ?a. binomial variable with 15 independent trialsb. A binomial variable with 25 independent trialsc. A variable that is not binomial with 25 independent trialsd. A binomial variable with 40 independent trialse. A variable that is not binomial with 40 independent trials
Mathematics
1 answer:
kozerog [31]3 years ago
4 0

Answer:

b. A binomial variable with 25 independent trials

Step-by-step explanation:

The conducted experiment is binomial experiment because outcome can be divided into success or failure. The success would be the people who read novel in the past year and also responses are independent of each other. We have to find the number of trials n in the given problem.

we are given that variance of R=6 and p=probability of success=0.4.

We know that variance of binomial distribution is

Variance=npq

where q=1-p=1-0.4=0.6.

By putting the values in variance formula, we can get the value of n.

6=n*0.4*0.6

6=0.24*n

n=6/0.24

n=25

Hence, random variable R is a binomial variable with 25 independent trials.

You might be interested in
What is the degree measure of f?
olganol [36]
The answer is 58 pretty sure
7 0
2 years ago
What are the zeros of the function f(x) = x2 + 8x + 4, expressed in simplest radical form? x = –4 ± 2StartRoot 3 EndRoot x = –4
SCORPION-xisa [38]

Answer:

<h2>x = -4 ± 2√(3)  </h2><h2 />

Step-by-step explanation:

Discriminant Δ = √(8²-4×(1)×(4)) = √(48) = √(4×12) = √(4)×√(12) = 2√(12)

then x = (-8 ± 2√(12))÷2 = -4 ±√(12) = -4 ±√(3×4) = -4 ± 2√(3)  

4 0
3 years ago
Read 2 more answers
Sara had 97 dollars to spend on 6 books. After
nalin [4]
The answer is 19 6×13 It’s 78-97 you get 19
5 0
2 years ago
When five is added to three more than a certain the result is 19 what is the number?
gulaghasi [49]

Answer: It should be 11

Step-by-step explanation:

11 + 3 = 14 14 is three more than 11 and when you add 5 you get 19

8 0
3 years ago
Help <br> Solve the following equations, and show/explain your work: 2x+4=18 and 25+3x=15.
nignag [31]

Answer:

2x+4=18

2x=18-4

2x=14

x=14/2

x=7

25+3x=15

3x=15-25

3x= -10

x= -10/3

x= -3.333

7 0
1 year ago
Other questions:
  • NEED HELP ASAP (will mark brainliest)
    12·1 answer
  • Select the polynomial that can be factored as (4x - 3)^2.
    10·1 answer
  • Calculate the distance between points A(4, 6) and B(-3, 9)
    12·1 answer
  • What is the vertex of the following graph?
    8·1 answer
  • Solve for'a.<br>5 + 14a = 9a – 5​
    6·2 answers
  • A music store has sold 3/5 of their hip-hop CDs, but 10 were returned.Now the store has 62 Hip-Hop CDs,How many Hip-Hop CDs did
    11·1 answer
  • Which of the following lists is in order from smallest to largest?
    5·1 answer
  • Find the sum using the formulas for the sums of powers of integers ( problem attached )
    11·1 answer
  • PLZ HELP ME SOLVE THIS
    5·2 answers
  • What is the equation of the line in slope intercept form?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!