What is a moving average?

In this video you will learn the definition of a moving average, and how to calculate a basic simple moving average.

Keywords  | Moving Average | Simple moving average | Statistics |

At MooMooMath we provide helpful Math and Geometry videos to help you figure out how to solve Math problems or review old Math concepts you may need to refresh. If you’re a Math student or teacher, we'd love to have you subscribe and join us!

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Interpreting a Box and Whisker Plot

In this video you will learn how to interpret a box and whisker plot.

A box and whisker plot gives you a visual picture of a data set.
The video explains how to answer the following questions from the Box and Whisker Plot

"1.What was the high number of  A’s earned by students?
2.What percent of the class earned more than 12 A’s?
3.What percent of the students earned more than 23 A’s?
4.What was the median number of A’s earned ?
5.What is the interquartile range?
6.What percent of the students have earned 18 or more A's so far  this year?
7.What percent of the students have earned less than 12 A's this year?
8.How much did the number of A's vary? Max – Min  24-10 = 14
9.Write several conclusions you can draw from looking at the box plot?"

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Leave a Comment analyzing, box plot, box whisker plot, interpreting, middle school math, statistics

Middle School Math-Finding Mode and Range

In this video you will learn how to find mode and range of a data set.

The mode is the number in a data set that occur most often.

The range is the difference between the highest number and the least number.

The video works several examples and gives step by step directions for finding each.

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Outlier-6th Grade Math

In this video you will learn what an outlier is and how an outlier impacts measure of center.

Highlights of the outlier video:

• What is an outlier?
• How does an outlier impact measure of center?
• Work an example problem showing how an outlier impacts mean more than median.
• When there is an outlier, it is best to use the median.
• No outlier use mean.

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Leave a Comment comparing numbers, mean, measure of center, median, moomoomath, outlier, statistics

How to calculate the Interquartile Range( IQR)-Statistics

In this video you will learn how to find the interquartile range,the Q1, and Q3 of a data set.

Follow these steps to find the IQR.

How to determine the Q1, Q3 AND IQR
Step #1: Order the numbers from greatest  to least.
Step #2: Indentify the extreme values.
Step #3: Find the MEDIAN of the data set
Step #4: Find  the UPPER QUARTILE ( Q3) which is the MEDIAN of the
              UPPER HALF of the data. You will only use the data to the
              right of the original median for this step.
Step #5: Find Q1 or the LOWER QUARTILE which is the MEDIAN of
              the LOWER HALF of the data). You will only use the data to
              the left of the original median for this step.
Step #6: Calculate the INTERQUARTILE RANGE by subtracting the
               LOWER QUARTILE from the UPPER QUARTILE.

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How to Read a Box and Whisker Plot

In this video you will learn to read a box and whisker plot.

In this video you will learn...

A Box and Whisker Plot takes data and divides it into four parts, and a five number summary.

The five number summary is,

• The smallest value or the minimum,
• The largest value or the maximum, and that is just listing your data from smallest to largest.
• The median which is the number that falls in the very center of the data or middle number.
• The lower quartile which is the middle number of the lower half, and the middle number of the top half.

The video goes through each quartile of the Box and Whisker plot and explains it's meaning.
Finally, the video looks at example an example plot and interprets the Box and Whisker Plot.

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Leave a Comment 6th grade math, box whisker plot, data, middle school math, moomoomath, statistics

How to create a frequency table

In this video you will learn how to create a frequency table.

A frequency table organizes data into categories to show the frequency of each. You can think of frequency as how often something occurs.
Steps for creating a frequency table.
Step 1 - Determine your intervals

Step 2 - Sketch out your frequency table.

Step 3 - Count the data in each interval and record with a tally.

A word about intervals.

Intervals must be ....

- Able to contain all of the data points

- Non-overlapping

- Equal

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This video covering middle school math  reviews the properties of a line and dot plot.

Line PLOTS use x's above the numbers to show the amount for each number, whereas Dot PLOTS use dots to show the amounts above each number on a number line.

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Math Words-Harmonic Mean

The Harmonic Mean is a type of average.

• It is the reciprocal of the arithmetic mean of the reciprocals.

Follow these steps to find the harmonic mean of a set of numbers.

• We will call the set of numbers n
• Add the reciprocals of the numbers in the set of numbers
• Divide n (amount of numbers in the set) by the total of adding the reciprocals

For example
½ + ¼ = ¾
2÷ 3/4 = 2/1 * 4/3 = 8/3 = 2.6667

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Probability of Independent Events

In this video, you will learn how to calculate the probability of two independent events.

Independent events do not have any impact one another.

An example independent event problem would be, "what is the probability of drawing a star from group one, and an arrow from the second group?"

The video gives step by step directions for solving these types of problems.

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