Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

In Dallas, some fire trucks were painted yellow (instead of the red) to heighten their visibility. Throughout 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 four accidents. At α = .01, did the yellow fire trucks have significantly lower accident rate?

a) Describe the hypotheses.

b) Describe the decision rule and sketch it.

c) Find out the sample proportions and z test statistic.

d) Make decision.

e) Find out the p-value and interpret it.

f) If statistically significant, do you think the difference is large enough to be significant? 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 n1 = 153,348 runs n2 = 135,035 runs

 

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M916875

Have any Question? 


Related Questions in Statistics and Probability

Ron and veronica need to choose a name for their newborn

Ron and Veronica need to choose a name for their newborn daughter. After giving the matter much thought, they have narrowed the list of possible names to four: Abigail, Iris, Irene, and Olga. They now must choose one nam ...

What would the null and alternate hypothesis be for the

What would the null and alternate hypothesis be for, " The airlines claim that complaints average less than 15 per month per airport. To investigate the problem an independent watchdog agency contacted a random sample of ...

A teacher wants to estimate the average pa of all teachers

A teacher wants to estimate the average pa of all teachers in a district. She wants to be 95% sure her estimate is correct. The standard deviation is $1,000, how large must her sample be to be accurate within $200? Pleas ...

1 the correlation between self-esteem and shyness is -50

1. The correlation between self-esteem and shyness is -.50. Interpret this correlation. 2. Which is larger-a correlation of +.45 or a correlation of -.60? Explain.

The mean gross annual incomes of certified plumbers are

The mean gross annual incomes of certified plumbers are normally distributed with the mean of $36,000 and a standard deviation of $3,572. The ship building association wishes to find out whether this number is still accu ...

1 what is the minimum reliability coefficient that

1. What is the minimum reliability coefficient that researchers consider acceptable? Why do researchers use this minimum criterion for reliability? 2. For what kind of measure is it appropriate to examine test-retest rel ...

Assignment- probability1a credit card company decides to

Assignment- Probability 1. A credit card company decides to study the frequency with which its cardholders charge for items from a certain chain of retail stores. The data values collected in the study appear to be norma ...

1 compare and contrast the development of northern and

1) Compare and contrast the development of Northern and Southern Europe after the treaty of verdun (has to be a paragraph long, with 3 examples, and answer the following questions: when,who,where, why) 2) Discuss the Pro ...

What is the variation in lsquofalse rejects that is not

What is the variation in ‘False rejects' that is NOT attributable to the Inspectors (as Sum of squares, not as percentage or mean)? 349.4 84.9 264.5 10.58 21.2

The annual commissions earned by sales representatives of

The annual commissions earned by sales representatives of Machine Products, Inc. a manufacturer of light machinery, follow the normal probability distribution.  The mean yearly amount earned is $40,000 and the standard d ...

  • 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