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Waiting time at a bank drive-in widow the average waiting time at a drive-in window of local bank is 10.3 minutes, with a standard deviation of 2.7 minutes. Assumes the variable is normally distributes. If a customer arrives at the bank, find the probability that the customer will have to wait a. between 4 and 9 minutes. B. less than 5 minutes or more than 10 minutes. C. how might a customer estimate his or her approximate waiting time?
Need to find the value of the Test Statistic and calculate the mean squares for regression and error for the following:
Convert the given fraction into its other two forms? Evaluate expression. Use a calculator to check.
Two popular over-the-counter antacids are compared to determine which brand is preferred. Three hundred subjects are randomly selected then divided into two groups of 150 each, and given one of the two antacids.
Use Chebyshev's theorem to find what percent of the values will fall between 162 and 292 for a data set with a mean of 227 and standard deviation of 13.
On a particular day during the most recent golf tournament, the organizer placed the whole (pin) in 0 back left corner of the green. 64 golfers played the hole with the new placement on that day. Find out the probability of the sample average numb..
Compute mean, standard deviation, coefficient of variation and 5 key percentiles for these data.
A random sample of 200 workers from Factory A showed that 130 were satisfied with their job. Formulate and test the appropriate hypotheses at the 1% level of significance
What do we mean by confidence intervals - provide an example that illustrates your answer. Suppose we were to apply 95% and 99% confidence to your study results.. how might your result differ and why?
a client gives you a data set of 30 observed values that represent the number of gallons of gas that 30 individual
Failure testing of a steel alloy resulted in the following S-N curve:N=(1.23*10^28)S^-14.85
Suppose that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Let x (sample mean) be the mean life of range sample of 25 such bulbs.
Find the probability that 5 randomly selected high school students will say that they exercise regularly. Express your answer for this item in percent.
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