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The average highway travel time from Waterloo to Toronto on accident free days (i.e., only regular volume of traffic) is around 90 minutes with a standard deviation of 10 minutes. The occurrence of an accident, however, results in an average delay of 90 minutes with a standard deviation of 20 minutes. The probability of an accident occurring on any given day has been estimated as 0.05.
Assuming the accident free travel time and accident caused delay time both follow the Normal distribution, use Monte Carlo simulation to estimate, for any given day, the
a) average travel time to Toronto.
b) probability that a trip to Toronto will take more than 3 hours.
Suppose that in fact the blood cholesterol level of all men aged 20 to 30 is symmetric and bell shaped with mean 186 mg/dl and an unknown standard deviation.
What is the probability that a call lasted between 180 and 300 seconds? What is the length of a call if only 1% of all calls are shorter?
Construct ogive cure and numerical measures for the discrete data.
The mean value of her net gain/loss will again be $2000? What if she repeats the experiment 10 times? Respond to at least two of your classmates' postings.
She randomly samples 67 CFOs and finds that 40 of them get their money news from newspapers. Does the test show enough evidence to reject the findings of Robert Half International? Use a = .05.
If they would like to estimate the true average time to within 1.9 minute (with 95% confidence) what sample size should they use? (remember to round to the next largest integer.)
A 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail? Show all steps carefully.
for a hypothesis test of a difference of means with n135 and n245 what is the value for the degrees of freedom
State in each of given cases whether you would expect relationship between given variables to be positive or negative or neither.
Sue Taylor, Director of Global Industrial Sales, is concerned by a deteriorating sales trend. Specifically, the number of customers is stable at 1,500, but they are purchasing less each year. She orders her staff to search for causes of the downwa..
A method of determining if relationships exist between two variables is:
A recent article in The Wall Street Journal reported that the 30-year mortgage rate is now less than 6 percent. A sample of eight small banks in the Midwest revealed the following 30-year rates (in percent):4.8 5.3 6.5 4.8 6.1 5.8 6.2 5.6
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