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The number of incoming phone calls defined by a Random Variable X at a company switchboard during 1- minute intervals is believed to have a Poisson distribution. Use a .05 level of significance and the following data to test the assumption that the incoming phone calls follow a Poisson distribution. State the Hypotheses as well as the conclusion.
x
Observed Freq.
0
14
1
33
2
48
3
44
4
30
5
15
6
9
7
8
Verify that for the data in the previous problem, the boxplot rule declares the values 20, 240, and 250 outliers. -What do the last three problems suggest about the boxplot rule versus the classic rule for detecting outliers?
Derive the variance-covariance matrix for the weighted least squares estimators when the variance-covariance matrix of the observations where W is given in (11.7) and k is a proportionality constant.
fifty people in the civilian labor force are randomly selected and the sample average age is computed to be 36.4.a find
Five cards are drawn from an ordinary deck without replacement. Find the probability of getting:
Use a 5% significance level (95% confidence level) to test the claim that the different vehicle categories have the same mean MPG.
The procedure square-list takes a list of numbers as argument and returns a list of the squares of those numbers. (square-list (list 1 2 3 4)) (1 4 9 16) Here are two different definitions of square-list. Complete both of them by filling in the mi..
Air Express, an overnight mail service, is concerned about the operating efficiency of the package-sorting departments at its Toledo, Ohio, terminal.
you are given 10 multiple choice questions with 5 choices each of which only one is correct. if you try and guess the
Tim has two more problems to solve on his test, but he doesn't know how long it will take to finish them. He assigns mutually irrelevant normal distributions to the times
write a null and alternative hypothesis for the following reseach question is there relationship between student gender
1. For the data of Example 1, label all possible outliers using: (a) (i) z-Score test, (ii) distribution-free test, and (iii) modi?ed z-score test.
Assuming sales are normally distributed, what is the probability that total sales for a 7 day period are $,7,700.00 or more.
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