Find the variance of the probability distribution

Assignment Help Basic Statistics
Reference no: EM132009201

Students in a class take a quiz with eight questions. The number x of questions answered correctly can be approximated by the following probability distribution. Complete parts? (a) through? (e).

x 0 1 2 3 4 5 6 7 8

?P(x) 0.02 0.02 0.06 0.05 0.11 0.22 0.28 0.16 0.08

?(a) Use the probability distribution to find the mean of the probability distribution. μ= ?(Round to the nearest tenth as? needed.)

?(b) Use the probability distribution to find the variance of the probability distribution. Sigma squared σ2=

Reference no: EM132009201

Questions Cloud

Find the probability that the drink is more than fluid ounce : Find the probability that the drink is more than 12.1fluid ounces. Round to four decimal places as? needed.)Can this be considered an unusual? event?
Currently needs to retain all of its earnings : Computech Corporation is expanding rapidly and currently needs to retain all of its earnings;
Assuming market is in equilibrium : Assuming the market is in equilibrium, what does the market believe will be the stock price at the end of 3 years?
Firm needs to plow back earnings to fuel growth : No dividends will be paid on the stock over the next nine years, because the firm needs to plow back its earnings to fuel growth.
Find the variance of the probability distribution : Use the probability distribution to find the variance of the probability distribution. Sigma squared s2=
Describe what contribution margin means : Identify and classify the fixed and variable manufacturing costs for producing your product. Describe what contribution margin means and how you would.
Diversified portfolio consisting : Suppose you held a diversified portfolio consisting of a $7,500 investment in each of 20 different common stocks.
What is a success in experiment : (A.) Is the experiment a binomial? experiment? (B.) What is a success in this? experiment?
Will you require electricity and other utilities : You are now ready to add administrative costs to your budget. Please discuss the types of administrative costs that will be required for your business.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Follow four-step process to create a confidence interval

Of the 880 respondents, 171 admitted that at least one light had been red. Follow the four-step process to construct a 95% confidence interval.

  Use z scores to determine on which exam the student

a student took two national aptitude tests. the national average and standard deviation were 675 and 150 respectively

  A random sample of 64 bearings produced by a machine has a

a random sample of 64 bearings produced by a machine has a mean diameter of 2.5 inches with a standard deviation of 0.1

  Determine the relative-frequency probabilities

In given Section, you learned two ways in which relative-frequency probabilities can be determined. Explain which method you think was used to determine.

  Develop an expression for all even central moments

Prove that all odd central moments of a Gaussian random variable are equal to zero. - Furthermore, develop an expression for all even central moments of a Gaussian random variable.

  Probability that one of the coins is double headed

A hat contains 100 coins, where at least 99 are fair, but there may be one that is doubleheaded (always landing Heads); if there is no such coin.

  A three-axis pick-and-place application requires

The system of Advanced Problem AP 10.1 is required to have a percent overshoot less than 13% with a steady state error for a unit ramp input less than 0.125(Kv = 8). Design a proportional plus integral (PI) controller to meet the specifications.

  Cost of the new equipment

Suppose the going rate for this procedure by other plumbing shops in the area is $85.00, not including the cost of the new equipment. If No Leak bids the disposal job at $85, on what percentage of such jobs will the actual time required exceed the ..

  Confidence interval for mean number-transactions per month

What is the estimate of the proporation of employees who do not use the ATM in a month? Develop a 95 percent confidence interval for the mean number of transactions per month.

  Problem on violating the sunk cost principle

Nathalie is an expert in taxes and she prefers more money to less. She bought a ticket to see Ariadne auj'Naxos at the opera. It cost her $50.

  Identify the experimental unit for the study

Use of herbal medicines. The American Association of Nurse Anesthetists Journal (February 2000) published the results of a study on the use of herbal medicines.

  Testing the effects of vitamin c

The endurance data set contains data from a 1983 paper [KM83] testing the effects of vitamin C on grip strength and muscular endurance.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd