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1. A raffle offers a first prize of $500, and two second prizes of $50 each. One ticket costs $2, and 1000 tickets are sold. Find the expected winnings for a person who buys one ticket.
2. In a survey of 25 patients who smoked, the following data was obtained. Each value presents the number of cigarettes the patient smoked per day. Construct a frequency distribution table which consists of six class limits, frequency, relative frequency, and cumulative frequency.
4 21 10 23 11 13 2 8 13 9 12 36 6 17 18 15 16 14 19 14 15 11 25 28 29
You have been given a report that presents two regression models with different numbers of independent variables. You do not have the data so you cannot re computed regression models. Nevertheless, you have been asked to find out which model is b..
Suppose the likelihood that any flight on Northwest Airlines arrives within 15 minutes of scheduled time is .90. We choose four flights from yesterday for study.
Determine the probability that at most 4 fish will be killed?
Suppose the random variable x is best described by a normal distribution with µ = 24 and σ = 2.7. Find the z-score that corresponds to each of the following x values.
Explain the terms parameter and statistics. Make sure the concepts of population and sample are included in the definitions.
To find out the probability that the age of a randomly selected CEO. The average age of CEOs is 56 years. Suppose the variable is normally distributed.
The following table shows the hardness (in Brinell hardness numbers) and the tensile strength (in thousands of pounds per square inch) of ten specimens of a certain alloy.
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
The lengths of pins produced by a machine follow a normal distribution with mean 2.54 cm and standard derivation 0.04 cm.
Is it reasonable to conclude that this set of n = 16 people is not a representative random sample of registered voters?
Write up your results by using scientifically recognized form.
A normal distribution with a mean of 55 and a standard deviation of 6 is evaluated to solve a business problem.
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