Statistics Homework Solutions
#1504
Using a probability distribution table to determine the standard deviation. Attachment in Word.
Consider the following distribution:
x P(=x)
40 .15
50 .30
70 .40
80 .15
What is the standard deviation of X?
a) 7.81
b) 13.08
c) 13.75
d) 61
e) 171
f) 189
In this problem, it is shown, given a series of values, x, and their corresponding probability of occurance, how to find the standard deviation of x.
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