# Stats

A particular report included the following table classifying 713 fatal bicycle accidents according to time of day the accident occurred.
Time of Day Number of Accidents
Midnight to 3 a.m. 36
3 a.m. to 6 a.m. 29
6 a.m. to 9 a.m. 65
9 a.m. to Noon 78
Noon to 3 p.m. 98
3 p.m. to 6 p.m. 127
6 p.m. to 9 p.m. 165
9 p.m. to Midnight 115
(a) Assume it is reasonable to regard the 713 bicycle accidents summarized in the table as a random sample of fatal bicycle accidents in that year. Do these data support the hypothesis that fatal bicycle accidents are not equally likely to occur in each of the 3-hour time periods used to construct the table? Test the relevant hypotheses using a significance level of .05. (Round your χ2 value to two decimal places, and round your P-value to three decimal places.)
χ2 =
P-value =

What can you conclude?
There is sufficient evidence to reject H0. There is insufficient evidence to reject H0.

(b) Suppose a safety office proposes that bicycle fatalities are twice as likely to occur between noon and midnight as during midnight to noon and suggests the following hypothesis: H0: p1 = 1/3, p2 = 2/3, where p1 is the proportion of accidents occurring between midnight and noon and p2 is the proportion occurring between noon and midnight. Do the given data provide evidence against this hypothesis, or are the data consistent with it? Justify your answer with an appropriate test. (Hint: Use the data to construct a one-way table with just two time categories. Use α = 0.05. Round your χ2 value to two decimal places, and round your P-value to three decimal places.)
χ2 =
P-value =

What can you conclude?
There is sufficient evidence to reject H0. There is insufficient evidence to reject H0.

1. 👍 0
2. 👎 0
3. 👁 28

## Similar Questions

1. ### statistics

A particular report included the following table classifying 711 fatal bicycle accidents according to time of day the accident occurred. Time of Day Number of Accidents Midnight to 3 a.m. 38 3 a.m. to 6 a.m. 29 6 a.m. to 9 a.m. 64

asked by annie on June 29, 2012
2. ### statistics

11. You are taking a multiple choice examination that has 20 questions in a particular section with 5 possible answers for each question. You did not study for the test and you guessed the answers. The probability that you will

asked by meri on July 6, 2015
3. ### Chem

Carbonyl fluoride, COF2, is an important intermediate for organic fluorine compounds. It can be prepared by the following reaction: CO2(g) + CF4(g) 2COF2(g) At 1000*C, K for this reaction is .50. What are the partial pressures of

asked by JP on April 15, 2007
4. ### Statistics

I have a problem I need some help on. I have answered parts. Any guidance would be appreciated. K For many years the numbers of accidents per week at a hazardous intersection have been studied. The number of accidents per week

asked by Kayse on August 4, 2007
5. ### chemistry

Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper

asked by christine on October 25, 2010
6. ### statistics

Suppose that the number of accidents occurring in an industrial plant is described by a Poisson process with an average of 1.5 accidents every three months. During the last three months, four accidents occurred. (a)probability

asked by Michael on September 30, 2011
7. ### Statistics

From a recent statistical analysis for the last five years, on an average there are 4 (major) air accidents per month in the world. Let X be the number of air accidents occurred in a randomly selected month. It is known that X ~

asked by Desire Glenn on November 5, 2012
8. ### MATH

The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car

asked by ANGEL on April 29, 2012
9. ### MATH

The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car

asked by ANGEL on April 29, 2012
10. ### premise and conclude

One might explain the difference in reaction by saying that we naturally respond more strongly to the deaths of Americans closer to home than to those of others halfway around the world. But then consider the fact that, every

asked by tommy evans on October 12, 2009

More Similar Questions