Length of stay is the total of wait and service times. Some longer stays are also approximated as 15 hours in this table. Hours Count Percent 1 13 2.69 2 42 8.68 3 80 16.53 4 101 20.87 5 85 17.56 6 67 13.84 7 34 7.02 8 19 3.93 9 13 2.69 10 18 3.72 15 12 2.48 Calculate the mean and variance for the random variable (length of stay). Round your answers to two decimal places (e.g. 98.76). Meani Variance -
Length of stay is the total of wait and service times. Some longer stays are also approximated as 15 hours in this table. Hours Count Percent 1 13 2.69 2 42 8.68 3 80 16.53 4 101 20.87 5 85 17.56 6 67 13.84 7 34 7.02 8 19 3.93 9 13 2.69 10 18 3.72 15 12 2.48 Calculate the mean and variance for the random variable (length of stay). Round your answers to two decimal places (e.g. 98.76). Meani Variance -
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:Actual lengths of stay at a hospital's emergency department in 2009 are shown in the following table (rounded to the nearest hour).
Length of stay is the total of wait and service times. Some longer stays are also approximated as 15 hours in this table.
Hours Count Percent
1
13
2.69
42
8.68
3
80
16.53
4
101
20.87
5
85
17.56
6
67
13.84
7
34
7.02
8
19
3.93
9
13
2.69
10
18
3.72
15
12
2.48
Calculate the mean and
iance for the random variable (length of stay). Round your answers to two decimal places (e.g. 98.76).
Mean = i
Variance =
2
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