Review for Statistics Test

Review for Statistics Test

By Mary Salamone

​1. Add the numbers

2.​ Divide that sum by the number of numbers you added

Multiple Choice

To find the mean of a set of numbers you...

• multiply all the numbers then divide by ho many numbers are in the set

• add the numbers together, then divide by how many numbers are in the set

Multiple Choice

What is the mean of these numbers?
4,5,5,2,3,3,2,8

• 40
• 24
• 4
• 256

Multiple Choice

What is the MEAN for this data?

• 80
• 1040
• 13
• 81

1. Put the numbers in order

2. Find the middle number

3. If there are two in the middle = add them and divide by 2​

Multiple Choice

What is the median of the following set of numbers?

(2, 24, 8, 17, 6, 88, 45)

• 24

• 17

• 45

• 8

Multiple Choice

Find the median for the set of numbers:

23, 37, 11, 58, 13, 45

• 30

• 23

• 37

• 28

Box Plots/Box and Whiskers

It is another way to represent data.  We have already used Dot Plots and Histograms to represent data.  Box Plots are an easy way to show if a number is above the middle of data or below the middle of data.

5 Number Summary

We use the 5 number Summary (5 special data number) to create and help interpret data from a box plot.  The 5 number summary includes:  Minimum, Maximum, (Q1) Quartile 1 or Lower Quartile, (Q2) Median, and (Q3) Quartile or Upper Quartile.

Parts of a Box Plot

• Min – Minimum: Smallest number of the Data Set

• Q1 – Lower Quartile:  The median of the lower half of the data

• Q2 – Median:   Middle number of the set of data

• Q3 – Upper Quartile:  The median of the upper half of the data

• Max – Maximum:  Largest number in the data set

• Interquartile Range (IQR): Q3 – Q1

Multiple Choice

What data value is the upper quartile (Q3)?

• 64
• 62
• 66
• 58

Multiple Choice

The median of 2nd period class is less than the median of 1st period

class.

• TRUE

• FALSE

Multiple Choice

The median for 1st period class is the same to Q1 in 2nd

period class.

• TRUE

• FALSE

Multiple Choice

The IQR is 10 for 2nd period.

• TRUE

• FALSE

​

Multiple Choice

What is the range for this data set? Remember to subtract the minimum value from the maximum value.

• 10

• 15

• 25

• 30