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Is lack of sleep causing traffic fatalities? A study conducted under the auspices of the National Highway Traffic Safety Administration found that the average number of fatal crashes caused by drowsy drivers each year was 1550 (Business Week, January 26, 2004). Assume the annual number of fatal crashes per year is normally distributed with a standard deviation of 300.
a. Determine the probability of fewer than 1000 fatal crashes in a year.
b. Determine the probability the number of fatal crashes will be between 1000 and 2000 for a year.
c. For a year to be in the upper 5% with respect to the number of fatal crashes, determine how many fatal crashes would have to occur.
A customer receives a defective product. What is the probability that it came from Binford? What assumptions did you make to answer this question?
Describe and analyze your quantitative data and Briefly address the data analysis process.
If level of significance ( α ) is 0.005 in two-tail test, how large is non rejection region under curve of the t distribution?
If 3 different factor levels show a lot of variation between levels this implies:
The independent variable observed, and y, the independent variable predicted) and are assumed to be normally distributed with mean = 0 and 2 variance how good is the linear fit?
At a certain university, 28% of the students major in zoology. Of all the students majoring in zoology, 68% are males. It is also known that 56% of all students at the university are male. Let Z represent the event that a randomly chosen student i..
Suppose you bid $12000. What is the probability that your bid will be accepted?
Find the indicated probability using the geometric or Poisson distribution. A newspaper finds that the mean number of typographical errors per page is nine.
Scores are obtained from the Law School Admission Test (LSAT) are normally distributed with a mean score of 550 and a standard deviation of 110.
To evaluate the effect of a treatment , a sample of n=9 is obtained from a population with a mean of m=40 and the treatment is administered to the individuals is found to be M-33
What is the probability that a random sample of 75 students will provide a sample mean SAT score within 10 of the population mean?
Democrat and Republican, if two voters are randomly selected for a telephone survey, what is the probability that they are both Republicans?
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