
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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3
of 8
6. Convert Observed Frequency into a probability Distribution. Random Variable,
X=number of days a randomly chosen student from our class has been absent (so far).
Write probabilities as accurate decimals (no rounding)
tally
Probability, P(x)
28
0.5
2
P(x)
1
4
1.5
2.5
1
1
0.5
1
1.5 2
2.5 3
total:
n= 40
a. Draw the probability histogram for X
b. P(randomly chosen student has missed more than 2 days) = P(
c. P(randomly chosen student has missed at most 1 day of class= P( _) =
=S<2>
d. P(randomly chosen student has missed no classes) = P(_
7. Expected Value: Show me the Money. A wallet contains 6 five-dollar bills and 4 one-
dollar bills. Two bills are randomly selected (without replacement) and their total is
noted. List the possible values for the random variable X = TOTAL value of the two bills
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