Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Mean, Standard deviation and Empirical Rule.

The following frequency distribution reports the electricity cost for a sample of 50 two bedroom apartments in Albuquerque, New Mexico during the month of May last year.

Electricity Cost

Frequency

$ 80 up to $100

3

100 up to 120

8

120 up to 140

12

140 up to 160

16

160 up to 180

7

180 up to 200

4

Total

50

a. approximate the mean cost.

b. Estimate the standard deviation.

c. make use of the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M920599

Have any Question? 


Related Questions in Statistics and Probability

1 what is the difference between simple also known as

1. What is the difference between simple (also known as univariate and bivariate) regression and multivariate regression? A) Simple regression includes one independent variable, and multivariate regression includes more ...

Suppose that the number of men equals the number of women

Suppose that the number of men equals the number of women. Prove the following claims, or provide counterexamples: (a) For every pair of matchings there exist preference relations for which these are two stable matchings ...

Christine has always been weak in mathematics based on her

Christine has always been weak in mathematics. Based on her performance prior to the final exam in Calculus, there is a 45% chance that she will fail the course if she does not have a tutor. With a tutor, her probability ...

Two sets of chromium analyses were performed on water

Two sets of chromium analyses were performed on water samples from a stream that runs near a chromium plating plant:                  Before the spill                                After the spill Mean :           0.95 ...

At a local college 316 of the male students are smokers and

At a local college, 316 of the male students are smokers and 474 are non-smokers. Of the female students, 70 are smokers and 630 are non-smokers. A male student and a female student from the college are randomly selected ...

The term critical value is often used to refer to the value

The term critical value is often used to refer to the value of a test statistic that determines statistical significance at some fixed α level for a test. For example,  + 1.96 are the critical values for a two-tailed z-t ...

1 when would you calculate a multiple correlation

1. When would you calculate a multiple correlation coefficient? What do you learn if you square a multiple correlation? 2. How does a cross-lagged panel correlation design provide evidence to support a causal link betwee ...

The average number of pages in a novel is 326 with a

The average number of pages in a novel is 326 with a standard deviation of 24 pages. If a sample of 50 novels is randomly chosen, what is the probability the average number of pages in these books is between 319 and 331?

Professor professorson a researcher at greendale community

Professor Professorson, a researcher at Greendale Community College, is interested in the effect of caffeine on the typing speed of students. Professorson obtains a random sample of 8 students who are given 400 mg of caf ...

What was manifest destiny what forces created this concept

What was Manifest Destiny? What forces created this concept? How was it to be achieved, and what doubts were raised as to its desirability?

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen