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.

asked by Mzba

Respond to this Question

First Name

Your Response

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
  2. probability

    There is a .97 chance that no accident will occur during any particular day at a racetrack of local importance. the probability of one accident a day is .02, and the probability of two accidents is .01. a. What is the expected
  3. STATISTICS

    The Sarasota Police department collected data on the number of car accidents ( X ) that occur each day on a certain stretch of route 41. From this data, they derived the probability distribution shown in the table below. X P(X) 0
  4. 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
  5. 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 ~
  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
  7. statistics

    It is a known fact that accidents happen more often driving the car rather than flying. Jim drives 180 days and flies 120 times per year. If for every 110 days driving you get into one accident and for every 10000 flying you get
  8. English/Writing

    Which one of the following sentences is written in the active voice? 1 - Accidents are witnessed every day. 2 - However, few people think seriously of doing something about them. 3 - Accidents are considered by most people as
  9. 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
  10. stats

    Mothers Against Drunk Driving (MADD) is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and

More Similar Questions