Statistics Review

All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?

• 1
• 2
• 3
• 4

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

Four data sets are shown below.
Set 1: {10, 19, 38, 50, 51}
Set 2: {5, 21, 26, 39, 51}
Set 3: {9, 38, 50, 50, 51}
Set 4: {5, 28, 28, 28, 51}
Which data set has the largest standard deviation?

• Set 1
• Set 2
• Set 3
• Set 4

What does this symbol represent?

• Standard Deviation
• Variance
• Mean Absolute Deviation
• Sigma

Find the median of these numbers:
4, 2, 7, 4, 3

• 2
• 5
• 7
• 4

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1
• 6
• 4.5
• 4

What is the median?

• biggest- smallest
• average
• the middle #
• # that happens the most

What is the mean?

• # happening the most
• the number in the middle
• biggest-smallest
• the average

Which of the following is a measure of variability?

• mean
• median
• mode
• standard deviation

What shape is a normal distribution curve?

• Half curve
• Round curve
• Bell curve
• Square curve