Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

The following frequency distribution reports electricity cost for sample of 50 two-bebroom apartments in albuquerque, new mexico throughout the month of May last year.

Electricity cost

Frequency

$80 upto $100

3

100 to 120

8

120 to 140

12

140 to 160

16

160 to 180

7

180 to 200

4

Total

50

  1. Estimate the mean cost.
  2. Estimate the standard deviation.
  3. Employ the empirical Rule to estimate the proportion of costs in two standards deviations of mean. What are these limits.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M917315

Have any Question? 


Related Questions in Statistics and Probability

1 a stock broker knows that the end-of-year balance x

1. A stock broker knows that the end-of-year balance X (percent of the January 1 balance) in the client,s account has a distribution with mean μ percent and standard deviation σ = 10. The broker collected a sample of 49 ...

Suppose two random variables x and y are both zero mean and

Suppose two random variables X and Y are both zero mean and unit variance. Furthermore, assume they have a correlation coefficient of  P . Two new random variables are formed according to: W = aX + bY, Z = cX + dY. Deter ...

Consider an ar2 process which is described by the

Consider an AR(2) process which is described by the recursion Where    is an IID random process with zero-mean and variance  (a) Show that the autocorrelation function of the AR(2) process satisfies the difference equati ...

In what ways were african social identity politics and

In what ways were African social identity, politics and economics kinship based and collective in nature? Why might transatlantic slave trade have been especially damaging to societies structured in this way?

A person with a contagious disease enters the population

A person with a contagious disease enters the population. Every day he either infects a new person (which occurs with probability ) or his symptoms appear and he is discovered by health officials (which occurs with proba ...

Letnbsp st be a periodic triangle wave as illustrated in

Let  S(t) be a periodic triangle wave as illustrated in the accompanying figure. Suppose a random process is created according to  is a random variable uniformly distributed over  (a) Find the probability mass function o ...

A gaussian mixture is a random variable whose pdf is a

A Gaussian mixture is a random variable whose PDF is a linear combination of two Gaussian PDFs, (a) Find the moment-generating function, MX(u) , of the Gaussian mixture. (b) Use the moment-generating function to find the ...

What are some of the business situations in which

What are some of the business situations in which appropriate hypothesis testing procedures could be used?

Letnbsp x ynbsp z and be independent gaussian random

Let  X, Y,  Z and be independent Gaussian random variables with equal means of µ =3 and variances    Estimate the mean and variance of   constructing a large number of realizations of this random variable in MATLAB and t ...

Letnbspwhere a t is a wide sense stationary random process

Let  where A (t) is a wide sense stationary random process independent of  be a random variable distributed uniformly over   Define a related process   are stationary in the wide sense but that the cross-correlation   be ...

  • 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

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate