QUESTION 5 a) The following table shows that 100 patients infected with COVID-19 for stages 1 to 4 on a particular day were reported at Hospital XYZ. X Frequency i) Find the value of n. 1 10 2 20 iii) Calculate the standard deviation of X. 3 n 4 40 ii) Calculate the probability that the number of patients infected with COVID-19 is at most stage 2.
QUESTION 5 a) The following table shows that 100 patients infected with COVID-19 for stages 1 to 4 on a particular day were reported at Hospital XYZ. X Frequency i) Find the value of n. 1 10 2 20 iii) Calculate the standard deviation of X. 3 n 4 40 ii) Calculate the probability that the number of patients infected with COVID-19 is at most stage 2.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Transcribed Image Text:QUESTION 5
a) The following table shows that 100 patients infected with COVID-19 for stages 1 to 4 on a
particular day were reported at Hospital XYZ.
X
Frequency
i) Find the value of n.
1
10
2
20
iii) Calculate the standard deviation of X.
3
n
4
40
ii) Calculate the probability that the number of patients infected with COVID-19 is at most
stage 2.
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