Number of faults to line length, Basic Statistics

A study on the occurrence of line faults in an electricity supply network was carried out over a two-year period.  Data was collected from six regions on the number of faults per year in each of the two years, and gave the results shown in the table below.

(a)   Region

(b)   Year

Line length (miles)

# of Faults.

Midlands

2008

15.6

15

Midlands

2009

15.6

18

North

2008

23.66

22

North

2009

23.66

16

South

2008

26.40

23

South

2009

26.40

18

East

2008

33.58

18

East

2009

33.58

28

West

2008

47.30

33

West

2009

47.30

27

Coast

2008

50.64

30

Coast

2009

50.64

27

(a)   Does the data indicate that the number of faults per mile has changed from year 2008 to year 2009?

(b)Draw the graph relating Number of Faults to Line length.

(c) Does the data support the suggestion that the two variables (# Faults and Line length) are related?  If so, find the relationship between them and state the probable limits of the Regression Coefficient with 95% confidence.

(d) Test the hypothesis that the graph should pass through the origin (i.e. a = 0).  Explain what this means in practical terms.

Posted Date: 2/25/2013 8:02:32 AM | Location : United States







Related Discussions:- Number of faults to line length, Assignment Help, Ask Question on Number of faults to line length, Get Answer, Expert's Help, Number of faults to line length Discussions

Write discussion on Number of faults to line length
Your posts are moderated
Related Questions
1. This question has multiple parts. For a distribution of scores with = 82 and standard deviation = 2.5, find the following: (Don't forget to sketch the normal curve to help

factor reversal test or circfied ular test satis reversal test question #Minimum 100 words accepted#

What is Art collection A personal perform of art or number of products of unique graphics such as artwork, statues, craftwork or other elements generally determined as a perform


what is the largest coefficient of (1+3x)^4 is ?

Managers are very interested in how a consumer makes choice among alternatives. In this exercise, we ask you to consider the price of gasoline you may purchase to operate

Amplification is the process by which the magnitudes of the variable quantity is increasing, especially the magnitude of voltage, current or power, without changing any other quant

i want you to make my buisiness statistics assignment

What is a sole proprietorship? A sole proprietorship is a form of business organization that is owned by one person. The owner is referred to as a sole proprietor. In accoun

what is an exclusive probability