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Stats Rock

Stats Rock. Using Pet Rocks to Find the Mean, Median and Mode. Data Set. A data set is a collection of data. It can be the ages of your classmates, the number of pets you own, or the weight of your Pet Rock. Mean, Median and Mode.

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Stats Rock

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  1. Stats Rock Using Pet Rocks to Find the Mean, Median and Mode

  2. Data Set A data set is a collection of data. It can be the ages of your classmates, the number of pets you own, or the weight of your Pet Rock.

  3. Mean, Median and Mode The Mean, Median and Mode Toads found on YouTube at http://www.youtube.com/watch?v=5C9LBF3b65s

  4. Mean of a Data Set Given this data set (3,5,6,4,2,0,1,4 )we will find its mean, median and mode. STEP 1: In order to find the Mean (also called average) of a data set you first add all the data values together. So we do the following: 3+5+6+4+2+0+1+4= 25 STEP 2: Now we count the number of values in our data set. We have 8 values. STEP 3: Finally we divide the sum of the values by the number of values. So, 25 ÷ 8 = 3.125 Our mean is 3.125

  5. Median of a Data Set Using the same data set (3,5,6,4,2,0,1,4), we will find its median. STEP 1: Place the data set in order from smallest to largest value(including all the repeating values). So our data set now looks like (0,1,2,3,4,4,5,6) STEP 2: Now look for the middle number in the data set. Since we have an even number of data values, the median will be found between numbers 3 and 4. In this case the median is found by adding the two numbers (3+4) and dividing by 2. This gives us 3.5 as the median. NOTE: In the case where you have an odd number of data values in the data set, the median is just the middle number (Ex. In the data set (1, 5, 11,12,14) the median is 11.

  6. Mode of the Data Set Using the same data set (3,5,6,4,2,0,1,4), we will find its mode. The mode is the value that occurs most often in the data set. It is possible that a data set does not have a mode because no values repeat or several values repeat the same number of times. The value 0 is not the same as the answer of no mode. STEP 1: Order the data set from smallest to largest values. (0,1,2,3,4,4,5,6) STEP 2: Find the value that repeats the most. In this case it is 4. So 4 is the mode of this data set.

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