Aim: How do we analyze data? The mean is the arithmetic average of a group of numbers. Find the mean of a group of numbers Step 1: Add all the numbers

Aim: How do we analyze data?

The mean is the arithmetic average of a group of numbers.

Find the mean of a group of numbers

Step 1: Add all the numbers.

7, 11, 12, 18, 23, 25

7 + 11 + 12 + 18 + 23 + 25 = 96

Step 2: Divide the sum by the number of items.

96 ÷ 6 = 16

The mean is 16.

Mean


Calculate the mean of the numbers below. Round to the nearest tenth place if necessary.

5, 12, 12, 28, 23, 31

4, 1, 7, 3, 1, 4, 8, 9, 9


The median is the middle number in a set of ordered numbers.

Find the median of a group of numbers.

Step 1: Arrange the numbers from least to greatest.

20, 19, 23, 18, 26

18, 19, 20, 23, 26

Step 2: Find the middle number.

The median is 20.

18, 19, 20, 23, 26

Median


If there are two middle numbers, how do I find the median?

18, 19, 30, 34, 36, 39

The median is 32.

Step 3: Find the mean of the two middle numbers.

30 + 34 = 64

64 ÷ 2 = 32


Calculate the median of the numbers below. Round to the nearest tenth if necessary.

33, 12, 12, 28, 31

28, 15, 11, 3, 32, 40


The mode is the number that appears most frequently in a set of numbers.

Find the mode of a group of numbers.

Step 1: Arrange the numbers from least to greatest.

20, 19, 26, 18, 26

18, 19, 20, 26, 26

Step 2: Find the number that is repeated the most.

The mode is 26.

18, 19, 20, 26, 26

Mode


Calculate the mode of the numbers below.

5, 12, 12, 28, 23, 12

4, 1, 7, 4, 1, 9, 8

8, 3, 2, 1, 5, 9, 7


Calculate the mode of the numbers below.The range tells how far apart the greatest and least numbers in a set are.

Find the range of a group of numbers.

250, 300, 925, 500, 15, 600

Step 1: Find the greatest and least values.

925 and 15

Step 2: Subtract the least value from the greatest value..925 - 15 = 910

The range is 910.

Range


Calculate the mean, median, mode AND range, of the numbers below.

12, 4, 6, 8, 3, 6

6, 1, 7, 4, 1, 4, 0, 9

mean median mode range

3, 9, 7, 2, 3, 5, 6, 0


1) Every day at 7am, Tamara recorded the outside

temperature in degrees Fahrenheit(oF). She placed the data

for one week in the table below. (2008)Day TemperatureMonday 58Tuesday 48Wednesday 49Thursday 61Friday 58Saturday 51Sunday 39

What is the range for the temperatures given in the table?


2) The annual salaries of the employees working at Kevin's restaurant are listed below? (2007)$21,750.0

0 $33,500.00 $18,900.00 $22,965.00$30,080.00 $47,250.00 $37,750.00 $46,500.00

What is the range for these salaries?

3) Lavonda learned to ride a unicycle. She practiced riding the unicycle for 25 minutes on Monday, 10 minutes on Tuesday, 22 minutes on Wednesday, 31 minutes on Thursday and 13 minutes on Friday. (2006)

What is the range for the data?


4) Calculate the mean and mode of the example below.

Score

Frequ

ency


5)

6)


7) A marine biologist records the following locations of 6 deep sea jellyfish in relation to the ocean surface: -2278 feet, -1875 feet, -3210 feet, -2755 feet, -2407 feet, and -2901 feet.

What is the mean location of the deep sea jellies?

Documents

Aim: How do we analyze data? The mean is the arithmetic average of a group of numbers. Find the mean of a group of numbers Step 1: Add all the numbers