Explain the mean and variance using the probability, Ask an Expert

Statistics

describe the mean and variance using the probability distribution.

Bill Russ, a production manager at Ross Co., maintains full records on the number of times each machine breaks down as well as requires service during the week. Bill records display that the Puret grinder has required repair service according to the subsequent distribution

Number of Breakdowns per week	Weeks	Probability
0	20	0.333
1	20	0.333
2	10	0.167
3	10	0.167
	60	1.000	totals

a) find out the arithmetic mean number of breakdowns per week.

b) find out the variance of the number of breakdowns per week.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M920150

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Assume that the car lot contains 25 percent porches 35

Assume that the car lot contains 25 percent Porches, 35 percent BMWs, and 40 percent Volvos. Of the Porches, 20 percent have navigation systems, 90 percent of the BMWs have navigation systems, and 70 percent of the Volvo ...

Discuss two types of costs amp two types of

Discuss two types of costs & two types of benefits(excluding tax shield and EPS) that would potentially arise from the leveraged recapitalization( a firm proposed a leveraged recapitalization which could create immediate ...

You are considering investing in a mutual fund the fund is

You are considering investing in a mutual fund. The fund is expected to earn a return of 15 percent in the next year. If its annual return is normally distributed with a standard deviation of 6.10 percent, what return ca ...

David barnes and his fianceacutee valerie shah are visiting

David Barnes and his fiancée Valerie Shah are visiting Hawaii. There are 38 guests registered for orientation. It is announced that 20 randomly selected registered guests will receive a free lesson of the Tahitian dance. ...

You have two investments that either make money or lose

You have two investments that either make money or lose money. Each one has a 60 percent chance of making money, and a forty percent chance of losing money. There is a 30 percent chance that both investments make money. ...

A governments department of transportation reported that in

A? government's department of transportation reported that in? 2009, airline A led all domestic airlines in? on-time arrivals for domestic? flights, with a rate of 83?%. Complete parts a through e below. a. What is the p ...

Let x be a random variable with range rx -1 0 1 and let px

Let X be a random variable with range RX = {-1, 0, 1} and let P(X = 1) = P(X = -1) = p/2 for some p ∈ [0, 1]. a) Compute P(X = 0). b) Compute the expectation E[X] and variance Var(X) of X as a function of p, and determin ...

A one bond has a coupon rate of 8 percent another a coupon

a) One bond has a coupon rate of 8 percent, another a coupon rate of 12 percent. Both bonds pay coupons annually, have 10-year maturities, and sell at a yield to maturity of 10 percent. If their yields to maturity next y ...

A survey found that 80 of college students had access to a

A survey found that 80% of college students had access to a tablet. A sample of 250 college students is taken. Find the mean and standard deviation for this binomial distribution.

Assume that the significance level is alpha equals alpha005

Assume that the significance level is alpha equals α=0.05. Use the given statement and find the? P-value and critical? value(s). The test statistic of z equals = -1.53 is obtained when testing the claim that p= 1/6 P-val ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert