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Question: Reach into your wallet, pocket, or wherever you can find at least ten coins, and sort all of the coins you have by type.
a. Count how many of each kind of coin you have (pennies, nickels, and so on, or the equivalent for your country). Draw a pie chart illustrating the distribution of your coins.
b. In part (a), "kind of coin" was the variable of interest for each coin. Is that a categorical, ordinal, or quantitative variable?
c. Now consider the total monetary value of all of your coins as a single data value. What type of variable is it?
d. Suppose you had similar data for all of the students in your statistics class. Write a question for which the variable "kind of coin" is the variable of interest for answering the question. Then write a question for which "total monetary value of the coins" is the variable of interest for answering the question.
for r = 1, 2, 3, .... Also, use this recursion formula and the fact that μ0 = 1 and μ1 = 0 to find μ2,μ3, and μ4, and verify the formula given for α3 in Exercise 35.
suppose that the mean value of interpupillary distance the distance between the pupils of the left and right eyes for
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a statistician has to decide on the basis of two observations whether the parameter ? of a binomial distribution is 14
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What properties must be true about the situation described here in order to use the Poisson distribution to calculate probabilities concerning the number.
The shop is open every day but Sunday. Assuming day-to-day sales are independent, what's the probability he'll sell over 2000 cups of coffee in a week?
Derive expressions for the coefficient of skewness and the coefficient of kurtosis in terms of the mean and variance µ and σ2.
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