Ask Question, Ask an Expert


Ask Statistics and Probability Expert

This assignment needs a considerable amount of computer work and written comment. You might need to seek guidance from your tutor along the way. Do not leave things until too late. Each and every problem carefully describes what you are required to do, so please follow the instructions carefully. Your answer to each and every problem must begin with the number of the problem.

In this assignment you will observe statistical data consisting of records of car accidents on Victorian roads and freeways in 2012. The Victorian department of transportation, Police and VIC Roads are interested in determining the major factors affecting car accidents in Victoria. They will utilize this information to develop strategies aimed at decreasing the number of fatalities on Victorian roads.

Alcohol is a main factor in road deaths in Victoria. Each year, about one quarter of drivers killed in road crashes had a blood alcohol concentration (BAC) of .05 or greater.

The Victorian road rules associating to the use of alcohol and drugs by drivers might be briefly summarized as follows:

Blood alcohol concentration:

Professional drivers such as truck, bus or taxi drivers should have a blood alcohol concentration (BAC) under 0.02; P-platers and learner drivers, as well as visitors from interstate or overseas, must have a zero blood alcohol concentration (BAC). All other drivers should stay under .05 BAC. You should be under .05 BAC while supervising a learner driver. This rule applies to public roads and as well private property.

Drug impairment:

This is illegal to drive while impaired by any drug whether that drug is legal or illegal. You should not be affected by illegal drugs while accompanying a learner driver. This rule applies to public roads and as well private property. (VIC Roads, 2012).

Data was collected and is contained in a file called and the columns of the file contain the given information:

349_random samples.jpg

Students must use their own random sample of 180recordsto answer the problems the random samples are in the file “find your name random samples for assignment.xlsx”.

Assignment Tasks:

For each task below, you should answer all the problems in sequential order and submit all of the required printouts, graphs, tables and summaries needed.

NB: Each graph and table must have a heading and each axis should have a label!!

problem: Introduction and Variable List: Give a short introduction to your report. describe the nature of the data. Read problems below and briefly describe the specific data and relationships which will be examined here.

problem: Data: Provide a printout of the data in your sample, sorted in ascending order based on Driver ID number.

problem: Give a short comment about what you what would happen to the answers to your assignment if you had a different randomly selected sample of size 180.

problem: Produce a histogram exhibiting the age distribution of the drivers involved in car accidents. Give your comments on the graph shape, and the most appropriate measures of centre and spread for this data.

problem: Pivot Tables: There is a general feeling that male drivers commit more driving offences causing more accidents and more fatalities compared to female drivers. For each of the following prepare a contingency table (cross-classification table), by using the

Pivot Table option in Excel. Make sure to comment on similarities or differences and any conclusions you can draw in each case.

a) The average car speed in an accident for the cause of accident split on gender.
b) The average driver blood alcohol level in a road accident for each license type split on gender.
c) The number of road accident fatalities for each license type split on gender.

problem: T-Test and CI: The Victorian police believe that the average speed of vehicles included in accidents on Victorian highways is significantly higher than 100 km/hr.

a) Obtain suitable descriptive statistics and so compute a 95% confidence interval for the mean car speed in accidents on Victorian highways.

b) Conduct a statistical test to find out if the average car speed in accidents on Victorian highways is considerably higher than 100 km/hr. Mention any suppositions, comprise relevant hypotheses and report the outcomes and conclusion in the conventional way.               
problem: Stratified scatter plot with trend lines: Obtain a stratified scatter-plot comparing the relationship between driver age and car speed (km/hr) in accidents for each gender. Think carefully regarding which variable must go on the vertical axis. Keep in mind; it is the independent variable which goes on the horizontal axis (that is, the x-axis). Comprise trend lines, their equations and R-squared values on the graph. Make sure you label axes appropriately and that your graph has a suitable title.

Briefly compare the nature of the relationship between these two variables, the driver Age (years) and Speed (km/hr), for males and females.

problem: Make a table of correlation coefficients for the following variables: Age, Number of Fatalities, Car Speed and Blood Alcohol Level. Discuss your results and state which pairs of variables have the maximum and the lowest correlation coefficients.

problem: Use Excel to carry out a regression analysis on the two variables: driver age (years) (independent variable) and car speed (km/hr) (dependent variable).

a) Copy the output into your assignment and use it to find out the answers to the given problems.

b) prepare down the regression equation.

c) State the R-squared value and the standard error and elucidate what they mean with respect to the data.

d) prepare down the value of the gradient of the regression line and describe what it means for this data.

e) Are the values for the constant and the gradient (slope) significant (that is, significantly different from zero) in this case? Validate your answer.

f) Do you think this regression model is a good model? Justify your answer by using the regression output.

problem: By using the information obtained for your analyses prepare a brief conclusion regarding what you found from the study above.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M9287

Have any Question? 

Related Questions in Statistics and Probability

The middlecreek branch of the national bank of virginia has

The Middlecreek Branch of the national bank of Virginia has 8 real estate loans over $1,000,000. Of these 8 loans, 3 are "underwrite." A loan is underwater if the amount of the loan is greater than the value of the prope ...

Describe the collapse of the soviet union begin with the

Describe the collapse of the Soviet Union. Begin with the events during the 1980s including the entire Gorbachev era. Should include at least the following topics: 1. Poland's democratic revolution of the 1980s 2. Gorbac ...

1 how did commerce at this stage of societal development

1. How did commerce at this stage of societal development influence the decisions/actions of governments? Some very specific results of these decisions influenced the circumstances we have today. Be sure to include addit ...

Problem 1 three times each day a quality engineer samples a

Problem 1: Three times each day, a quality engineer samples a component from a recently manufactured batch and tests it. Each part is classified as conforming (suitable for its intended use), downgraded (unsuitable for t ...

Let s sube rn be a closed and convex set and let x isin

Let S ⊆ Rn be a closed and convex set, and let x ∈ S. Find a hyperplane H(α, β) strictly separating x from S; i.e., x is in the interior of H +(α, β), and S is in the interior H -(α, β).

Onenbspstudy based on responses 1014nbsprandomly

One study, based on responses 1,014 randomly selected teenagers, concluded that 39% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half of a ...

The university is attempting to set its staffing plan for

The University is attempting to set its staffing plan for the next several year, and it wants to determine if the distribution of students among various graduate majors has changed from the historical averages which were ...

1 what are the most important threats to validity that

1. What are the most important threats to validity that occur in quasi experimental research designs when the research is conducted over a period of time? What techniques can be used to minimize these potential interpret ...

This exercise generalizes aumanns agreement theorem to a

This exercise generalizes Aumann's Agreement Theorem to a set of players of arbitrary finite size. Given an Aumann model of incomplete information with beliefs (N, Y, (Fi) i ∈N  , s, P) with n players, suppose that for e ...

Consider the following belief space where the set of

Consider the following belief space, where the set of players is N = {I, II}, and the set of states of nature is S = {s 1 , s 2 }: Write out the belief hierarchies of orders 1, 2, and 3 of Player I, at each state of the ...

  • 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