body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Houghton Mifflin Harcourt Algebra 1, 2015

HM

Houghton Mifflin Harcourt Algebra 1, 2015 View details

1. Measures of Center and Spread

Continue to next subchapter

Exercise 8 Page 312

To find the median, make sure the numbers are in numerical order.

Mean: 14
Median: 13

Practice makes perfect

We are given the numbers of members in five karate classes. Let's find the mean and the median of this data.

Mean

In order to find the mean, or average, we need to find the sum of members and divide by the number of classes.

Mean=Sum of values/Number of values

SubstituteValues

Substitute values

Mean=13+12+10+16+19/5

Add terms

Mean=70/5

Calculate quotient

Mean=14

The mean of members in the karate class is 14.

Median

The median of a set of data is the middle number, or the average of the two middle numbers, when placed in order from least to greatest. Let's start by writing the numbers in numerical order. 10,12, 13,16,19 Since there is an odd number of classes, the median is the middle number, which is 13.

Subchapter links

Explore p.305-311

Elaborate p.311

Evaluate: Homework and Practice p.312-314

Lesson Performance Task