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A Mail Order Company Tracks the Number of Returns It

Question 21

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A mail order company tracks the number of returns it receives each day.Information for the last 50 days shows  Number of returns  Number of days 0−996100−19920200−29915300 or more 9\begin{array} { c c } \text { Number of returns } & \text { Number of days } \\\hline 0 - 99 & 6 \\100 - 199 & 20 \\200 - 299 & 15 \\300 \text { or more } & 9\end{array}
a.How many sample points are there?
b.List and assign probabilities to sample points.
c.What procedure was used to assign these probabilities?

Correct Answer:

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a.4
b.P(0 - 99 returns)= .12
P...

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