| Practice
Page |
Math
A |
 |
|
|
Practice Examples
(Do you have paper, a pencil and calculator?) |
 |
| 1.
|
The weekly salaries of six employees at McDonalds are
$140, $220, $90, $180, $140, $200. For these six
salaries, find: (a) the mean (b) the median (c) the mode
ANSWER
|
| 2. |
Andy has grades of 84, 65, and 76 on three math tests.
What grade must he obtain on the next test to have an
average of exactly 80 for the four tests?
ANSWER
|
| 3. |
Test scores for a class of 20 students are as follows:
93, 84, 97, 98, 100, 78, 86, 100, 85, 92, 72, 55,
91, 90, 75, 94, 83, 60, 81, 95
|
Test
Scores |
Frequency |
| 91-100 |
|
| 81-90 |
|
| 71-80 |
|
| 61-70 |
|
| 51-60 |
|
|
a) Copy and complete the table shown
at the left.
b) Find the modal interval.
c) Find the interval that contains the
median. |
ANSWER
|
| 4. |
A storeowner kept a tally
of the sizes of suits purchased in her store. Which measure of central tendency should the storeowner use to
describe the average suit sold? Justify your answer.
ANSWER
|
|
