Number of faults to line length, Basic Statistics

Assignment Help:

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.


Related Discussions:- Number of faults to line length

General linear regression model, find the variance of least square estimato...

find the variance of least square estimator beta hat for general linear regression model when k=2 in matrix form?

Calculate the probability, The Stalk Market, an independent grocery chain, ...

The Stalk Market, an independent grocery chain, has been serving and supporting local communities for over 90 years. Its stores offer friendly service and a wide assortment of natu

Opertions research, meaning and definition of operations rsearch

meaning and definition of operations rsearch

Random variables, A Biology student estimates that the probability that a c...

A Biology student estimates that the probability that a certain organism will live beyond 24 hours is .40. If he conducts on 7 of this type or organisms, find the probability that

Permutation and combination, How many different starting lineups of 5 baske...

How many different starting lineups of 5 basketball players can be chosen from a squad of 13 players?

Calculate the probability of dealt, Please show work as we need to understa...

Please show work as we need to understand how to calculate the following 4 questions: 1.  You play a card game where 2s are considered wild.  You are dealt 7 cards - what is the

Give the appropriate choice of the null hypothesis, 1 . Below are the point...

1 . Below are the points scored by the winning team in Week 10 of NFL professional football games this Fall, 2011. 24 17 44 13 21 24 30 20 37 26 17 22 27 37 37 45 a) Use thes

Standard deviation, how do i calculate standard deviation for a frequency d...

how do i calculate standard deviation for a frequency distribution

Managerial, Kody Corporation uses a job-order costing system with a plantwi...

Kody Corporation uses a job-order costing system with a plantwide overhead rate based on machine-hours. At the beginning of the year, the company made the following estimates:

Bartlett test, what are the statistics hypotheses for bartlett''s test for ...

what are the statistics hypotheses for bartlett''s test for exponential distribution?

Write Your Message!

Captcha
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