Slides from Wednesday, April 11.

1. • 1. Review: Decimal Division
• 2. Review: Mean, Median, Mode, Range
• 3. Bar Graphs
• 4. HW- Exercises 2 and 3

2. Dividing Decimals
• If the divisor is
not a whole
number, move 3.8) 1614.62
decimal point to
right to make it a
whole number
• Move decimal 38)16146.2
point in dividend
the same number
of places.

3. Dividing Decimals
• Divide as usual. 42 4 9
Keep dividing
until the answer
38) 16146.2
terminates or a 152
repeating pattern 94
shows up. 76
•Position the decimal 186
point in the quotient 152
directly above the 34 2
decimal point in the 342
dividend. 0

4. • 1. Find the mean of the following test scores:
• 88% 22% 90% 82% 95%
• The mean is 75.4%
• 2. Find the median of the test scores.
• 22% 82% 88% 90% 95%
• The median is 88%
• 3. Why do the mean and median differ so greatly?
• The mean and median differ because of the low test
score of 22%.

5. • Complete the Bowling with the Pros and
Hockey Stats with your table.

6. • On March 31, in San Diego, a meteorologist reported
60° F as the high temperature for the day for the first
time during March. The meteorologist also reported
60°F as the median high temperature for San Diego
for the month. On how many March days in San
Diego was the high temperature lower than 60°F?
60
These values are below 60° These values are above 60°
1 day
15 days 15 days

7. • Tim collected data on his height (to the nearest inch) and
that of four of his friends, but he lost the data. Time was
the tallest, measuring 72 inches. Also, no two friends had
the same height. Tim had calculated the following
measures: median= 68, mean = 68, range= 7. Figure out
what the original data was.
Tim’s Data 1. How many values do we need to find?
Mean 68 2. How many do we know?
Median 68 3. What does the range tell us?
Range 7 4. What does the median tell us?
5. What does the mean tell us?
6. What else do we know about the data?

8. • Tim collected data on his height (to the nearest inch) and
that of four of his friends, but he lost the data. Time was
the tallest, measuring 72 inches. Also, no two friends had
the same height. Tim had calculated the following
measures: median= 68, mean = 68, range= 7. Figure out
what the original data was.
1. How many values do we need to find? 5
2. How many do we know? 2
3. What does the range tell us? The range tells us the value of the shortest height.
4. What does the median tell us?The median tells us the EXACT middle height.
5. What does the mean tell us? The number AFTER all heights have been added and divided.
6. What else do we know about the data? There is no mode.

9. • Tim collected data on his height (to the nearest inch) and
that of four of his friends, but he lost the data. Time was
the tallest, measuring 72 inches. Also, no two friends had
the same height. Tim had calculated the following
measures: median= 68, mean = 68, range= 7. Figure out
what the original data was.
Tim’s Data 1. How many values do we need to find?
Mean 68 2. How many do we know?
Median 68 3. What does the range tell us?
Range 7 4. What does the median tell us?
5. What does the mean tell us?
6. What else do we know about the data?

10. • Data can be Month Temp (°F)
displayed on a January 13
April 35
graph. July 58
• A graph gives a October 35
picture of the data.
Average Monthy Temp in
Anchorage, AK
• A bar graph is used 80
60
for visual 40
comparisons. 20
0
January April July October

11. Title
Average Monthy Temp in
Anchorage, AK
80
60
40
20
0 Horizontal Axis
January April July October (items being
compared)
Vertical Axis
(numbers
representing
temperatures)

12. Average Monthly Temperatures in What is the average
Los Angeles, CA temperature in Los
80
Angeles in April?
70
60
50
40
30
The average
20 temperature
10
0
is 60° for the
January April July October month of
April.

13. Average Monthly Temperatures in In what month is
Los Angeles, CA the average
80
temperature in Los
70
60
Angeles 69°?
50
40 Since there isn’t
30
a 69° on the
20
10
vertical axis, you
0 must choose the
January April July October one which is
closest to 70°

14. Average Monthly Temperatures in What is the range of
Los Angeles, CA average monthly
80 temperatures in Los
70
Angeles?
60
50
40 Find the highest
30
temperature and
20
10
subtract the
0 lowest
January April July October temperature
from it.

15. • Exercise 2- Answer the questions based on the
information presented in both of the bar
graphs.
• Exercise 3- Drawing Bar Graphs