Transcript 6.1 Day 1 - Campbell County Schools

Discrete and Continuous Random Variables
Yesterday we calculated the mean number of
goals for a randomly selected team in a
randomly selected game to be μx = 2.851.
The table below gives the probability
distribution for X one more time.
Compute and interpret the standard deviation of the random
variable X.
A continuous random variable X takes all
values in an interval of numbers. The
probability distribution of X is described by a
density curve. The probability of any event is
the area under the density curve and above
the values of x that make up the event.
The weights of three-year-old females closely
follow a Normal distribution with a mean of
μ =30.7 pounds and a standard deviation of
3.6 pounds. Randomly choose one threeyear-old female and call her weight X. Find
the probability that the randomly selected
three-year-old female weighs at least 30
pounds.
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I can calculate the standard deviation of a
discrete random variable.
I can interpret the standard deviation of a
discrete random variable.
I can use a probability distribution to answer
questions about possible values of a random
variable.
Page 354: 14, 18, 20, 24, 26
Read pages 346-352