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Traffic crash data show that average number of vehicle miles driven (VMD) between successive (reported) traffic crashes involving the same vehicle can be modeled by a normal random variable with u = 80,000 miles and sigma = 40,000 miles. What is the probability that a vehicle will be driven at least 160,000 miles before crashing? What is the probability that a randomly selected vehicle's VMD will lie between 60,000 and 100,000 miles since its previous crash?
Develop a p chart with 3-sigma control limits and evaluate whether the process is in statistical control
How much of the variation in the dependent variable would be explained by the independent variable in this situation? Use job satisfaction and employee turnover as the variables for this problem.
where p is the binomial probability of returning a completed survey, and log is the natural logarithm. The multiple logistic regression output from fitting this model is given below.
Determine the probability of having more than 3 defects in a roll?
Be sure to include information about how you would use the concept of probabilities to apply to profiles for hiring more satisfied individuals.
At the .05 level of significance, is there convincing evidence that the number of absences per employee has increased?
A researcher discovers the number of parking tickets that a group of students have received during their driving careers. Twenty students reply and they have received between 9 and 20 parking tickets.
A sample of 200 traffic accidents this year showed 74 persons were also involved in another accident within the last five years. Use the .01 significance level. Can we use z as the test statistic? Tell why or why not.
Change the frequencies to percentages - is there a group more likely to get high salaries.
Promotion occurs on average every 10 days in a large corporation. What is the probability that the next promotion will occur within:
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
Find out correlation coefficient r, If student take 35 minutes to complete exam, what is his predicted score.
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