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A recent study of the Greater Los Angeles Taxi Driver Association demonstrated that the average or media tariff that they charge from Hermosa Beach to the International Airport of Los Angeles is $18.00 and the standard deviation is $3.50. We select a sample of 15 tariffs.
a. Which is the probability that the median of the sample is between $17 and $20?
b. What we must suppose to do the previous calculation?
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = . 05, does vehicle type vary by mall location?
Is it reasonable to conclude that this set of n = 16 people is not a representative random sample of registered voters?
The mean number of passengers per cruise is 1,820 and the standard deviation is 120.
Which probability distribution is suitable when sampling without replacement?
Find out the probability that the return for common stocks will be more than 0%.
The mean television viewing time for Americans is 15 hours per week (Money, November 2003). Assume a sample of 60 Americans is taken to further investigate viewing habits. Suppose the population standard deviation for weekly viewing time is Q = 4..
The sales manager had predicted, before the business started, that year 1's sales would be 410 air conditioners. Using exponential smoothing with a weight of alpha = 0.30, develop forecasts for years 2 through 6.
Solve different inventory control problems using an appropriate OR method.
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.500 inches.
Carry out the global test of hypothesis to find out whether any of the regression coefficients are not equal to 0. Use.05 level of significance.
Suppose that sales of lemonade and sales of brownies are independent, determine standard deviation in his revenue.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
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