Question
Asked Oct 17, 2019
  1. The following table provides a probability distribution for the random variable x.

x

f(x)

2

0.20

4

0.30

7

0.40

8

0.10

 

  1. Compute E(x), the expected value of x.
  2. Compute σ2, the variance of x.

Compute σ, the standard deviation of x

check_circle

Expert Answer

Step 1

The provided table for probability distribution is:

f(x)
x
2
0.2
4
0.3
7
0.4
8
0.1
help_outline

Image Transcriptionclose

f(x) x 2 0.2 4 0.3 7 0.4 8 0.1

fullscreen
Step 2

Further,

fullscreen
Step 3

1)

The expected value of x can b...

E (x) x)
x
5.2
help_outline

Image Transcriptionclose

E (x) x) x 5.2

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Math

Statistics

Related Statistics Q&A

Find answers to questions asked by student like you

Show more Q&A add
question_answer

Q: It is estimated that 0.46 percent of the callers to the Customer Service department of Dell Inc. wil...

A: It was found that 0.46% of the calls to the customer service center will receive a busy signal.The r...

question_answer

Q: Hello, I am studying for an exam. I'm not sure how to tackle this problem and I cant find any exampl...

A: Consider a random variable X which, follows binomial distribution, indicates the number of couples w...

question_answer

Q: In 2014, the per capita consumption of soft drinks in the United States was reported to be 42.1 gall...

A: 1.Probability that someone consumed more than 60 gallons of soft drinks can be obtained by entering ...

question_answer

Q: Lottery: In the New York State Numbers lottery, you pay $3 and can bet that the sum of the numbers t...

A: It is given that the probability of winning is 0.095. Therefore, the probability of loss is 0.905 (=...

question_answer

Q: Need help with F. Step by step in TI 84

A: From the given information,f)

question_answer

Q: Two samples, each with n = 5 scores, have a pooled variance of 40. What is the estimated standard er...

A: Given Datan1 = n2 = 5pooled variance = 40Estimated standard error is given by

question_answer

Q: The mean annual tuition and fees for  a sample of 14 private colleges in California was $37,900 witr...

A: Given dataHypothesized mean = 35000 Standard deviation = 7200Sample mean = 379000Sample size n = 14a...

question_answer

Q: Problem 1. A coin which lands heads with probability p is tossed repeatedly. Assuming independence o...

A: Consider,P be the probability of heads comes up.Number of tosses are independent.

question_answer

Q: The following data represent the living situation of newlyweds in a large metropolitan area and thei...

A: The provided data is,