1. Solve for r
I = Prt
3. Solve for y first.
Then substitute in the
value for x and find the
value for y.
-2x+y=10; x = 3
Lesson (1.6) page 45
Lesson (1.6) page 45
An Introduction to Statistics:
Measures of Central Tendancy
Measures of Central Tendancy tell you about the
center of your data.
• They tell you what's in the middle,
• how often things appear,
• and what you might expect to see in the future.
Mean - is the average of a group of numbers, which
we get by adding all the numbers together and
dividing by how many numbers we had.
Let's say that these are the first 11 quiz scores
out of 30 points that you earned last year.
What was the mean quiz score?
The median of a group of numbers is the middle
number when the numbers are written in order. If you
have an even set of numbers, then there is no middle
and you must take the mean of the middle two
numbers.
What was your median quiz score?
What is the median in this set of numbers?
The mode of a group of numbers in the number that
appears the most. There may be one mode, more
than one mode, or no modes at all.
What was the mode of your 11 quizzes?
Find the mean, median, and mode of this set of
numbers:
The Range of a set of data is a measure of
dispersion. That means that the range tells you
about how your data spreads out.
The range is the difference between your largest
and smallest values.
What was the range of your quiz scores?
Find the range of this data set:
Classwork: Review worksheets
Homework:
p. 49 EOE #10-22
all # 24-28
p. 51 even #56-70
Study for quiz thru (1.6)