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The Fresh Flower Boutique knows that the number of roses it can sell varies from week to week. The owner believes that in? 50% of the weeks she sells 100? roses, in? 25% of the weeks she sells 150 and in the remaining? 25% of the weeks she sells 200. To make sure that she has enough? product, the owner buys 200 roses in the beginning of each week at a cost of? $1.50 each. Assume that any roses that go unsold are discarded at the end of the week. If she sells the roses for? $5 each, what is the probability distribution for her weekly profit for extra long stemmed? roses?
A random sample of 100 persons suffering from mental depression reveals that 75 of them cannot properly evaluate their job skills.
You are given the sample mean and the sample standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence int..
The mean age at death is 15 years and the standard deviation is 7 years. What percentage of the dinosaurs' ages were within 1 standard deviation of the mean?
What is the probability that a randomly selected tire will have a life of at least 30,000 miles?
A reporter took a simple random sample of 725 voters in a region that has a population of 12,457. He recorded that 338 of the persons polled favored Issue 1 on the ballot.
Apply the table compression algorithm in Figure 5.22 to the table shown in Figure 5.20, presenting rows in the order 1, 5, 2, 4, 3. Compare the success of compression with the result presented in Figure 5.23.
Find, using Chebyshev's inequality, a lower bound for the probability that the number of cars arriving at the intersection in 1 hour is between 70 and 130.
Get a test statistic and p -value. Interpret results at α = .01.
i have 100 units of a product in stock. the demand d for the item is a continuous random variable with the following
Suppose that you take a sample of size 26 from a population that is not normally distributed. Can the sampling distribution of x¯ be approximated by a normal
plot the great-circle route from washington d.c. 39 degree n 77 degree w to moscow 56 degree n 38 degree e.a what is
Identify a qualitative and quantitative variable. If you need to use two data sets to have both a qualitative and quantitative variable, that is okay.
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