Math 119
In Class Problems 7 Feb 20
1. The weekly salaries for employees of a furniture store are listed below:
154, 196, 259, 261, 310, 318, 369, 372, 381
Find the mean and median of the weekly salaries.
2. Find the midrange of the data from problem #1
3

Math 119
In Class Problems 8 2/27
The random variable x is the number of houses sold by a realtor in a single month. The
probability distribution is shown below:
Houses Sold (x)
0
1
2
3
4
5
6
7
Probability P(x)
0.24
0.01
0.12
0.16
0.01
0.14
0.11
0.21
1.
F

Math 119
In Class Problems 9
3/4
1.
The participants in a quiz show are picked from a pool of applicants with
approximately equal numbers of men and women. Among the last 12
participants there have been only 2 women. If participants are picked
randomly, w

Math 119
In Class Problems 10 3/6
If Z is a standard normal variable, find the probability:
1.
The probability that Z is less than 1.26
2.
The probability that Z is greater than 2.33
3.
Thw probabilit y that Z is less than 0.78
4.
The probability that Z i

Math 119
In Class Problems 11
March 11
1.
The weekly salaries of teachers in one state are normally distributed with a
mean of $490 and a standard deviation of $45. What is the probability that a
randomly selected teacher earns less than $550 a week?
2.
A

Math 119
In Class Problems 13 March 18
1. The table below shows the probability distribution for x, the number that shows
up when one of a pair of dice is rolled.
X
P(X)
1
2
3
4
5
6
0.23
0.10
0.10
0.24
0.11
0.22
Find the mean and standard deviation of the