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Mike manages a theater complex called Cinema I, II, III and IV. Each of the four auditoriums plays a different film; the starting times are staggered to avoid the large crowds. The Cinema has one ticket booth and a cashier who can maintain an average service rate of 280 patrons per hour. Service times are assumed to follow an exponential distribution. Arrivals on a typical activity day are Poisson distributed and average 210 per hour.
To determine the efficiency of the current ticket operation, Mike wishes to examine several queue operating characteristics.
What is the probability that there are more than two people in the system?
1. More than three?
2. More than four?
In testing the difference between two means from two independent populations, the sample sizes do not have to be equal to be able to use the Z statistic.
If level of significance ( α ) is 0.005 in two-tail test, how large is non rejection region under curve of the t distribution?
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
Based on surveys conducted in 1989 and 1999, a researcher compared the proportion of high school age females interested in a career in science in 1989 with the proportion in 1999. He concluded that the proportions were not significantly different ..
Using WSJ or IBD look up the following stocks: General Electric, General Motors, Microsoft and Intel and answer the following questions for each stock. You may have to refer to several issues of your newspaper for all of the information if the pap..
Make a stem plot for the men height data. Calculate the five-number summary for the women.
What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?
Would it be reasonable to conclude that the population distribution is Poisson with a mean of 2.0?
Findout either the given correlation is significant at given level of significance. Illustrate what does sample size have to do with the significance of r.
Do these data suggest a statistically significance difference between the proportions of drug-resistant cases in the two states? Use a 0.02 level of significance and computed value of 2.37.
Find the value of the standard normal random variable z, called z 0 such that:
A loaf of bread is normally distributed with a mean of 22 oz and a standard deviation of 0.5 oz. What is the probability that a loaf is more than 22.25 oz?
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