QR Finals Review Part 1

THE FINAL REVIEW
Part 1
Mean, Median, Mode

Multiple Choice

Another word in statistics for "mean" is:

• the average

• the middle

• the largest

• the most

Multiple Choice

Determine the mean of the following data set: {8,5,9,12,1}

• 7

• 9

• 35

• 8

• 4320

Multiple Choice

Determine the mean of the following data set: {25,11,12,11,10,15}

• 12

• 14

• 11

• 84

• 6

Mean

To determine the mean of a data set, we add all the values together and then divide by the number of items in the data set.

{1,2,3,4} - there are four items in the data set

Add all the values 1+2+3+4=10

Divide by the number of items in the data set. 10÷4=2.5

Multiple Choice

Another word in statistics for "median" is:

• the average

• the middle

• the largest

• the most

Multiple Choice

Determine the median of the following data set: {8,5,9,12,1}

• 7

• 9

• 35

• 8

• 5

Multiple Choice

Determine the median of the following data set: {25,11,12,11,10,15}

• 12.5

• 14

• 11.5

• 12

• 11

Median

To determine the median of a data set, we place all the values in order from the least to the greatest. The value in the middle is the median

{5,2,3,1,4} - there are five items in the data set

Arrange them from least to greatest {1,2,3,4,5} - 3 is the median (the middle)

If the middle is in between 2 numbers, take the average of the 2 numbers.

Multiple Choice

Another word in statistics for "mode" is:

• the average

• the middle

• the largest

• the most

Multiple Choice

Determine the mode of the following data set: {25,11,12,11,10,15}

• 6

• 25

• 12

• 10

• 11

Multiple Select

Determine the mode of the following dataset {1,1,1,2,2,3,3,4,4,4,4}

• 1

• 2

• 3

• 4

Mode

To determine the mode of a data set, we count the number of times each value occurs in the dataset.

{5,2,3,1,4,5} - there are six items in the data set

5 appears twice while all other values only appear once. 5 is the mode

Multiple Choice

Determine the mean of the following dataset {82,23,59,94,70,26,32,83,87,94,32}

• 62

• 23

• 59

• 70

Multiple Select

Determine the mode of the following dataset {82,23,59,94,70,26,32,83,87,94,32}

• 32

• 94

• 23

• 70

• 87

Multiple Select

Determine the median of the following dataset {82,23,59,94,70,26,32,83,87,94,32}

• 32

• 23

• 94

• 70

• 87

Poll

How comfortable are you with mean, median and mode?