Statistical Measures

Mean

100

How do you find mean?

Add all numbers together, and divide by the amount of factors

200

In a basketball game, the number of baskets a team shot is: Team 1: 2, 7, 3, 4, 2 Find the mean

Mean= 3.6

300

A class chooses 7 students to take a survey, one question is "How many hours do you read at school?" Results: 1, 4, 2, 1, 1, 3, 2

Answer: 2

400

Beard lengths: 3cm, 4cm, 7cm, 2cm, ?

Mean: 5 cm

What is the missing beard length?

9 cm

500

Weight of potatoes: 5oz, 10oz, 3oz, 9oz, 12oz, 11oz, 4oz, ?

Mean: 7oz

Find the missing weight of the potato.

2oz

Median

100

How do you find median?

Line up the data from least to greatest, then start crossing the greatest and lowest numbers on at a time until you get one or two numbers left. If you have two numbers, add the numbers together and divide by 2.

200

Students on a school field trip bought a souvenir Money spent: $7, $3, $12, $13, $3.14 Find the median

Median: $7

300

The temperature this week is: 72, 77, 79, 83, 91, 98, 101 Find the Median

83

400

In art, the class drew pictures Some drew: 3,2,1,0,3,8,1 find the median

2

500

# of brothers and sisters: 10,2,5,2,1,1,0,0,2,3,4,5,3,3 Find the median

2.5

Mode

100

Find the mode, it's that simple of a question Numbers: 4, 7, 6, 5, 10, 6, 21, 20

Mode: 6

200

Find the mode: 1.9, 2.4, 1.8, 1.9, 2.4, 1.8

MODE: 1.9, 1.8

300

Find what's wrong with this answer and correct it: Question: Find the mode- 1.9, 2, 3, 1.9, 3 Student's Answer: Mode= 1.9

They only chose one answer, correct answer would be 1.9, and 3

400

Find the mode: 4,8,9,0,33,96,47,86,74,33

33

500

Find the mode: 1,2,3,4,5,6,7,8,9,0,75,33,56,78,91,23,42,53,75,86,101

75

Interquartile Range

100

Find the first and third quartiles: 1,3,4,6,7,9,10

Median is 6 so Q1=3 and Q3=9

200

Find the median, Q1 and Q3: 2,4,6,7,9,11,14,17,19

Median is 9

Q1=5

Q3=15.5

300

How do you find the IQR?

1) put the #s in order form least to greatest 2) find the median 3) find Q1 and Q3 4) subtract Q3 and Q1

400

A family bought some food Costs:$14,$7,$20,$5,$25 What is the IQR?

16.5

500

Find the IQR: 0,2,5,7,8,9,11,12,18,20,21

12

Statistical Questions

100

What do 6th graders prefer to eat for lunch?

yes

200

How many brothers does Martha have?

no

300

What time did the students in this class get up this morning?

yes

400

How old are the players on the basketball team?

yes

500

Give an example of a non statistical question then change it to a statistical question.