Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Test the proportions of yellow fire trucks have a significantly lower accident rate.

In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At   = .01, did the yellow fire trucks have a significantly lower accident rate?
(a) Declare the hypotheses.
(b)State the decision rule and sketch it.
(c)Find out the sample proportions and z test statistic.
(d)Make a decision.
(e)Find out the p-value and interpret it.
(f)If statistically significant, do you think the difference is large enough to be important? If so, to whom, and why?
(g)Is the normality assumption fulfilled? describe.

Accident Rate for Dallas Fire Trucks

 

 

Statistic

Red Fire Trucks

Yellow Fire Trucks

Number of accidents

x1 = 20 accidents

x2 = 4 accidents

Number of fire runs

n= 153,348 runs

n2 = 135,035 runs

 

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921822

Have any Question? 


Related Questions in Statistics and Probability

A philosophy professor assigns letter grades on a test

A philosophy professor assigns letter grades on a test according to the following scheme. A: Top 12% of scores B: Scores below the top 12% and above the bottom 63% C: Scores below the top 37% and above the bottom 22% D: ...

Manifest destiny was a powerful force in nineteenth century

"Manifest Destiny was a powerful force in nineteenth century America not only calling for the expansion of the nation physically but also for spreading its ideals to more parts of the world. In what ways was slavery both ...

A history class is comprised of 8 female and 6 male

A history class is comprised of 8 female and 6 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 2 female students and 3 male students ...

What is the comparison between the threat that the world

What is the comparison between the threat that the world faced from the fascists and communists during the 20th century and the threat faced by the world today from radical Islam? Be sure to include specific two historic ...

Question a survey found that an american family generates

Question: A survey found that an American Family generates an average of 17.2 lb of glass garbage each year. Assume that the standard deviation of the distribution is 2.5 pounds. If a sample of 55 families is randomly se ...

In 4-5 paragraphs describe gender roles how they were

In 4-5 paragraphs describe gender roles (how they were influenced/changed) though out middle ages (with specific examples of people, years etc.)

Data mining review questions - xlminer labs - cluster

Data Mining Review Questions - XLMiner Labs - Cluster Analysis1. Marketing to Frequent Flyers. The file EastWestAirlinesCluster.xls contains information on 4000 passengers who belong to the airline's frequent flier progr ...

Question the mean weight 10 randomly selected newborn

Question: The mean weight 10 randomly selected newborn babies at a local hospital was found to be 7.14 and the standard deviation was found to be 0.87 lbs. If the weights of newborn babies is approximately normally distr ...

A population of lawnmowers life expectancy is described

A population of lawnmowers' life expectancy is described with a Weibull distribution, where α=1 and β=15. Determine 1× (once) and 2× (twice) the expected mean lifes for the population, as well as their corresponding cumu ...

Suppose that a certain college class contains 49 students

Suppose that a certain college class contains 49 students. Of these, 24 are seniors, 26 are English majors, and 9 are neither. A student is selected at random from the class. (a) What is the  probability  that the studen ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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