HomeworkLib
Question

1. Let the random variable X represent the number of defective parts for a machine when 3 parts are sampled from a production
(c) If g(X) = 2X +3, what is the expected value of g(X)? dan od (d) What is the standard deviation of g(X) ?
math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

CRYSTAL Page No. Saution Date x2fcx) 0.3 8 OSI IS.O 2 O 10 O-20 O40 3 O.Ol a.09 O.03 Σ1)-1 Ex2fR)= 2xfa) 074 Σχ(cx) O-74 1 ECd) Standard deviation df x) [ x 1.8096 1.3452

1 0
Add a comment
Know the answer?
Add Answer to:
1. Let the random variable X represent the number of defective parts for a machine when...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Let random variable x represent the number of heads when a fair coin is tossed two...

    Let random variable x represent the number of heads when a fair coin is tossed two times. a) construct a table describing probability distribution b) determine the mean and standard deviation of x (round to 2 decimal places)

  • Five percent (0.05) of the parts produced by a machine are defective. Twenty(20) parts are selected...

    Five percent (0.05) of the parts produced by a machine are defective. Twenty(20) parts are selected at random for study. A. what is the probability that more than 4 parts are defective? B. what is the probability that exactly 3 parts are defective? C. what is the expected number of defective parts in the sample? D. What is the variance and standard deviation of defective parts in the sample?

  • Let the random variable x represent the number of girls in a family with three children....

    Let the random variable x represent the number of girls in a family with three children. Assume the probability of a child being a girl is 0.31. The table on the right describes the probability of having x number of girls. Determine whether the table describes a probability distribution. If it does, find the mean and standard deviation. Is it unusual for a family of three children to consist of three girls? 0 1 2 3 P(x) 0.329 0.443 0.199...

  • 8. Let the random variable x represent the number of girls in a family with three...

    8. Let the random variable x represent the number of girls in a family with three children. Assume the probability of a child being a girl is 0.35 The table on the right describes the probability of having x number of girls. Determine whether the table describes a probability distribution. If it​ does, find the mean and standard deviation. Is it unusual for a family of three children to consist of three​ girls? x   P(x) 0   0.275 1   0.444 2  ...

  • Let the random variable x represent the number of cars owned by a family. Assume that...

    Let the random variable x represent the number of cars owned by a family. Assume that x can take on five values: 0, 1, 2, 3, 4. A partial probability distribution is shown below:          x 0 1 2 3 4 p(x) 0.2 0.1 0.3 ? 0.1          i.       The probability that a family owns three cars equals _______          ii.       The probability that a family owns between 1 and 3 cars, inclusive, equals _______          iii.     ...

  • It is known that a machine produces 3% of defective parts. We choose a piece at...

    It is known that a machine produces 3% of defective parts. We choose a piece at random to check if it has no defects. How is the variable X that is worth 1 distributed if the part is not defective and 0 if it is defective? What are your mean and variance?

  • 30% of students that take the SAT score over 1200. Let the random variable X represent...

    30% of students that take the SAT score over 1200. Let the random variable X represent the number of students that score over 1200 on the SAT in a random sample of 32 students. Find the standard deviation of X.(round to 3 decimals places)

  • Let X represent a random variable whose distribution is normal, with a mean of 40 and...

    Let X represent a random variable whose distribution is normal, with a mean of 40 and a standard deviation of ?. Are these two probabilities below equal or not? Explain your reasoning. ?(? ≥ 65) vs. 1−?(? > 83)

  • please help with all. In the following probability distribution, the random variable x represents the number...

    please help with all. In the following probability distribution, the random variable x represents the number of activities a parent of a 6th-to 8th grade student is involved in. Complete parts (a) through (1) below. * 1 0 1 2 3 4 5 P(x) 0.269 0 206 0.224 0.239 0.062 (a) Verify that this is a discrete probability distribution This is a discrete probability distribution because the sum of the probabilities is and each probability is (6) Graph the discrete...

  • Last​ year, a person wrote 115 checks. Let the random variable x represent the number of...

    Last​ year, a person wrote 115 checks. Let the random variable x represent the number of checks he wrote in one​ day, and assume that it has a Poisson distribution. What is the mean number of checks written per​ day? What is the standard​ deviation? What is the​ variance? ​(Round to three decimal places as​ needed.)

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT