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The drive-thru times at Tim Horton's are normally distributed with µ = 138.5 seconds and σ = 29 seconds.
(a) What is the probability that a randomly selected car will get through the drive-thru in less than 100 seconds?
(b) What is the probability that a randomly selected car will spend more than 160 seconds in the drive-thru?
(c) What proportion of cars spend between 2 and 3 minutes in the drive-thru?
(d) Would it be unusual for a car to spend more than 3 minutes in the drive-thru? Why?
For each of the following datasets, explain whether you would expect the mean or the median of the observations to be higher:- In a rural farming community, for each household the number of children is measured.
Construct the ninety-five percent confidence interval for the difference in the portion of the populations who prefer MACs.
a regional track championship has decided that they will invite the fastest 15 of runners in their region runners with
Assume the daily rate follows a normal probability distribution with a standard deviation of ?$22.12.
What is the minimum weight for a passenger who outweighs at least 90% of the other passengers?
How does one get chicken pox? Can it be lethal? What are the chances of one getting it twice?
What percentage of hypertension at age 50 is attributable to the weight gain from age 18 to 50?
For the daily lottery game in Illinois, participants select three numbers between 0 and 9. A number cannot be selected more than once, so a winning ticket.
For commercial banks in each state, the U.S. Federal Deposit Insurance Corporation has listed their total deposits (billions of dollars) as follows.- Construct a frequency distribution and a histogram for these data.
The KW water is provided to approximately 750,000 people, who are served through more than 362,000 accounts. All accounts are metered and billed monthly.
a. Is this a representative sample mean or an extreme value for a sample of n=16 scores? b. Is this a representative sample mean or an extreme value for a sample of n=100 scores?
when testing a claim about a population mean with ? known either or both of these conditions is satisfied the
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