Please quietly take your seat and begin your Do-Now work.

OTTO MIDDLE SCHOOL

LANSING SCHOOL DISRICT

Measure and Compare

Otto Middle SchoolMr. Manzella’s Math

Class

• Mean – Total of all observations divided by the number of observations• Median – In an ordered list, the

middle number• Mode – the most commonly found

number

Measure and Compare

Otto Middle SchoolMr. Manzella’s Math

Class

• Mean (also, “Average”)1. Add up all of your observations2. Divide the total by the number of

things you’ve observed

Measure and Compare

Otto Middle SchoolMr. Manzella’s Math

Class

Name Wingspan Height Hands Feet KneeJa 187 178 22 29 59Bu 175 168 18.5 28 53Ab 173 150 18 26 50Aw 166 148 20 30 50Om 163 153 20.5 11.5Ad 162 175 18 33 55Na 154.5 154 19 24.5 46.5Ba 154 146 17 24.5 46Es 152 159 16 26 46Sa 150 154 19 25 46Ji 149 150 22Ng 136 143 18.5 23.5 44.5Do 129 135 18.5 20.5 39.5

Find the Mean

Otto Middle SchoolMr. Manzella’s Math

Class

Name WingspanStudent 1 187Student 2 175Student 3 173Student 4 166Student 5 163Student 6 162Student 7 154.5Student 8 154Student 9 152Student 10 150Student 11 149Student 12 136Student 13 129Total 2050.5

2050.5 ÷ 13 = 157.73 Total ÷ # of Students = Average (mean)

Find the Median

Otto Middle SchoolMr. Manzella’s Math

Class

1.) Order from Greatest to Least2.) Find which is the “middle” student?

Name WingspanStudent 1 187Student 2 175Student 3 173Student 4 166Student 5 163Student 6 162Student 7 154.5Student 8 154Student 9 152Student 10 150Student 11 149Student 12 136Student 13 129

Find the Mode

Otto Middle SchoolMr. Manzella’s Math

Class

• The number that repeats most often is called the“Mode”

Hands22

18.51820

20.5181917161922

18.518.5

Measure and Compare

Otto Middle SchoolMr. Manzella’s Math

Class

• Graphs, Charts, and Pictures

Measure and Compare

Otto Middle SchoolMr. Manzella’s Math

Class

Histogram

<130 140 150 160 170 180 More

Frequency 1 1 2 3 3 2 1

0.25

0.75

1.25

1.75

2.25

2.75

3.25

Histogram – Height (cm)

Freq

uenc

y

Due By End of Hour

Otto Middle SchoolMr. Manzella’s Math

Class

Calculate the Mean for each columnName Wingspan Height Hands Feet KneeJa 187 178 22 29 59Bu 175 168 18.5 28 53Ab 173 150 18 26 50Aw 166 148 20 30 50Om 163 153 20.5 11.5Ad 162 175 18 33 55Na 154.5 154 19 24.5 46.5Ba 154 146 17 24.5 46Es 152 159 16 26 46Sa 150 154 19 25 46Ji 149 150 22Ng 136 143 18.5 23.5 44.5Do 129 135 18.5 20.5 39.5