Finding Standard Deviation

According to the empirical rule, what percentage of data falls within 1 standard deviation? 

• 25%

• 68%

• 95%

• 99.7%

According to the empirical rule, how much of the data falls within 3 standard deviations? 

• 25%

• 68%

• 95%

• 99.7%

Between what two standard deviations of a normal distribution contain 68% of the data?

• one below and one above

• two below and two above

• two below and zero

• zero and two above

What is the third step in finding the standard deviation?

• Find the Mean

• Subtract the mean from each number in the data set

• square each number that you've subtracted the mean from or the deviations

• add each deviation together

What does standard deviation represent?

• How many different variations are in the data set.

• How the population varies compared to the sample.

• How spread out each data value is from the mean.

• How often the most popular choices in a sample were picked compared to the least popular choices

What is the standard deviation on this Normal Curve?

• 6

• 12

• 34

• 18

List each set of data by color from the lowest standard deviation to the highest standard deviation.

• blue, green, pink, red

• red, pink, green, blue

• pink, green, red, blue

• blue, green, red, pink

What is the symbol used to represent the standard deviation in statistics?

• μ

• x

• σ

• n

What is the fourth step in finding the standard deviation?

• Find the mean

• Square Each deviation

• Divide the sum by the number of scores

• Add the squared devivations

What is the fifth step in finding the standard deviation?

• Find the mean

• Add the squared Deviations

• Square the deviations

• Divide the sum by the number of scores