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

What three criteria must be met to establish that one

What three criteria must be met to establish that one variable causes changes in behavior? Which of these criteria are met by quasi-experimental designs? Which of these criteria are not met, and why?

You are an economic consultant whose task is to investigate

You are an economic consultant whose task is to investigate whether there is gender discrimination with respect to earnings in the government of Little Rock. You take a random sample of 22 people of which 10 are women an ...

Jim has weighted gpa of 384 his high school gpas are

Jim has weighted GPA of 3.84. His high school GPA's are normally distributed with a mean of 2.9 and a standard deviation of 0.5. Kim's high school uses unweighted GPA's and she has a GPA of 3.57. GPA's are also normally ...

Questions1 the following results were observed in a

QUESTIONS: 1. The following results were observed in a prospective study of the drug Viagra (based on data from Pfizer Inc.)  Use the data to answer the following questions:   Viagra Treatment Placebo Headache 117 29 No ...

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 ...

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 ...

Topicnbspstate party structurethreadnbspfirst review the

Topic:  State Party Structure Thread:  First, review the Reading & Study presentation "Political Structure at the State Level" as an example about the structure of the Republican Party in Virginia Select 1 of the major p ...

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 ...

A pizza restaurant offers 11 different toppings 6 of them

A pizza restaurant offers 11 different toppings: 6 of them are vegetarian and 5 of them are non-vegetarian. A customer selects her first topping at random and then selects another one at random from the remaining topping ...

The following tables depict the preferences of three

The following tables depict the preferences of three universities regarding a set of applicants, and the preferences of the applicants regarding the universities. Every university also has a specified quota for the numbe ...

  • 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