M6/1 Midterm Test Review

DEFINITIONS

100

True or False:

To find the median, you need to arrange the data in ascending order.

True

200

A data set is _________ if it has 3 modes.

trimodal

300

_______ is the middle value in the data set arranged in ascending order.

median

400

To find the ________, we add up all values in the data set and then divide by the total frequenc.

mean

500

The mean is also known as (a.k.a) ____________.

average

Mean

100

Find the mean.

13, 18, 13, 14, 13, 16, 14, 21, 13

15

200

Phat purchased season tickets for 8 football games. The total cost was $176. What is the average price per game?

$22

300

Given: 4, 3, 4.5, 6, x, 7.3, 9.5, 10, 2.1, 11.5

What should be the value of x so that the mean of this data set is 6.6?

8.1

400

Find the mean of this ungrouped data.

Number of Pets        Frequency

          1                         4

          2                         3

          3                         2

          4                         1

          5                         2

          6                         1 

          7                         1

          8                         1 

3.4

500

Find the mean of this grouped data.

Classes     Frequency

1-10             2

11-20           7

21-30          10

31-40           3

41-50           1

22.89

Median

100

Find the median.

5, 3, 10, 13, 8, 18, 5, 17, 2, 7, 9, 10, 4, 1

7.5

200

What is the position of the median in this data set?

12, 13, 13, 15, 10, 11, 11, 11, 10, 9

5.5th or 5.5

300

Baitong sold 15 raffle tickets, BaKron sold 35, Guide sold 23, Aii sold 47, and Stung sold 23, What was the median number of tickets sold?

23 tickets

400

What is the lower boundary of the median class of this grouped data?

Classes     Frequency

1-10             2

11-20           7

21-30          10

31-40           3

41-50           1

19.5

500

Find the median of this grouped data.

Classes     Frequency

1-10             2

11-20           7

21-30          10

31-40           3

41-50           1

22

Mode

100

Find the mode/modes.

65, 59, 60, 55, 56, 70, 61, 61, 65, 56, 53, 65

65

200

What type of data set is this according to the number of modes?  

48, 42, 47, 57, 47, 41, 40, 48, 45

bimodal

300

What is the mode in this ungrouped data?

Number of Pets        Frequency

          1                         4

          2                         3

          3                         2

          4                         1

          5                         2

          6                         1 

          7                         1

          8                         1 

1

400

Which class is the modal class?

Test Score      Frequency

16-20                  2

21-25                  7

26-30                 14

31-35                  8

36-40                  8

41-45                  1

26-30

500

Find the mode of this grouped data.

Test Score      Frequency

16-20                  2

21-25                  7

26-30                 14

31-35                  8

36-40                  8

41-45                  1

28.19

Graphs

100

A frequency polygon can be drawn in 2 ways. WITH or WITHOUT a _____________.

histogram

200

Which graph uses the class midpoints on the x- axis?

(histogram, frequency polygon, ogive)

frequency polygon

300

Which graph uses the lower class boundaries on the x-axis?

(frequency polygon with a histogram, frequency polygon without a histogram, Less than Ogive, Greater than Ogive)

Greater than Ogive