Mean Median Mode and Range Question Juston has

Question? Juston has 6 test grades. He wants to know his test average. How

100, 97, 72, 71, 85, 67 • Step 1 – Add all the numbers.

100, 97, 72, 71, 85, 67 • Step 2 – Divide the sum by

Question? Karen travels with her grandparents on summer trip. One day, she ask her

15, 2, 16, 6, 9 • Step 1 – Place the numbers in order

2, 6, 9, 15, 16 • Step 2 – Circle the middle number. Median

What do you do if there are two middle numbers? 1, 3, 4 4,

Question? Mr. Mangum has 15 students in his 7 th period class. Mr. Mangum

{ Test Grades 100, 80, 90, 60, 90, 70, 50, 100, 70, 90, 80,

50, 60, 70, 80, 90, 90, 90, 100, • Step 2 – Find the

Question? Ashley wants to know the difference in population between the largest and the

579, 496, 415, 988, 618, 518, 269 Step 1 – Order the numbers from

269, 415, 496, 518, 579, 618, 988 269 • Step 2 – Find the

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Mean, Median, Mode, and Range

Question? Juston has 6 test grades. He wants to know his test average. How can he find out? MEAN 100, 97, 72, 71, 85, 67 Definition • Mean – the average of a group of numbers.

100, 97, 72, 71, 85, 67 • Step 1 – Add all the numbers. 100+97+72+71+85+67= 492

100, 97, 72, 71, 85, 67 • Step 2 – Divide the sum by the number of grades listed. 82 6)492 - 48 100+97+72+71+85+67=492 12 - 12 82 is his test average 0 or the MEAN.

Question? Karen travels with her grandparents on summer trip. One day, she ask her grandma what is the name of grassy lane in the middle the road. “It’s the MEDIAN. ” 15, 2, 16, 6, 9 Definition • Median – the middle number in a set of ordered numbers.

15, 2, 16, 6, 9 • Step 1 – Place the numbers in order from least to greatest. 2, 6, 9, 15, 16

2, 6, 9, 15, 16 • Step 2 – Circle the middle number. Median is 9

What do you do if there are two middle numbers? 1, 3, 4 4, 8 8, 10, 16 • Step 3 – If there are two middle numbers, numbers find the mean of these two numbers. + =12 The median is 6 2)12 - 12 0

Question? Mr. Mangum has 15 students in his 7 th period class. Mr. Mangum gives a test of mean, median, mode, and range. The test grades are as follows: 100, 80, 90, 60, 90, 70, 50, 100, 70, 90, 80, 50, 90. Anna ask, “What do you call it when one grade shows up more than the rest? ” “It’s the “Its mostcalled popular number. ” MODE. ” Definition • Mode – the number that appears most frequently in a set of numbers.

{ Test Grades 100, 80, 90, 60, 90, 70, 50, 100, 70, 90, 80, 50, 90 • Step 1 – Arrange the numbers in order from least to greatest. 50, 60, 70, 80, 90, 90, 90, 100,

50, 60, 70, 80, 90, 90, 90, 100, • Step 2 – Find the number that is repeated the most. The MODE is 90.

Question? Ashley wants to know the difference in population between the largest and the smallest school in Scott County. She remembers that she studied about it but she doesn’t remember what its called. “Its called RANGE. ” Definition • Range – the difference between the greatest and the least value in a set of numbers.

579, 496, 415, 988, 618, 518, 269 Step 1 – Order the numbers from least to greatest 269, 415, 496, 518, 579, 618, 988

269, 415, 496, 518, 579, 618, 988 269 • Step 2 – Find the lowest and highest numbers. Then Subtract. -_____ 719 This is the RANGE