Frequency Table Homework (Unit 1, Chapter 2)

Find the lower class boundary for the class whose limits are 16-25

15.5

In the frequency table below, find the relative frequency of the 3rd class to the nearest tenth of a percent. Height (inches) Frequency 63.0-64.9 4 65.0-66.9 25 67.0-68.9 9 69.0-70.9 1 71.0-72.9 0 Add up frequency, equaling 39 divide that by class 3 which is 9 and you get .2307692308 then multiply by 100 and get 23.07 so the answer is 23.1 % (Please include the % symbol in your answer.)

23.1%

Find the class width for the class whose class limits are 17 - 19. *The class width is the difference between the upper or lower class limits of consecutive classes. All classes should have the same class width. In this case, class width equals to the difference between the lower limits of the first two classes.

3

What is the Cumulative Frequency of the sixth class in the Frequency Table below? Daily Low Frequency 35-39 2 40-44 3 45-49 6 50-54 11 55-59 5 60-64 5 65-69 1 to get cumulative frequency add the frequency. So for 6 class you'd add 2+3+6+11+5+5

32

In the frequency table below, find the lower class boundary of the 3rd class. Daily Low Temperature Frequency 40-42 1 43-45 3 46-48 5 49-51 11

45.5

For the frequency table below, find the midpoint of the 3rd class Daily Low Temp Frequency 40-42 1 43-45 3 46-48 5 49-51 11 Class midpoints are the values in the middle of the classes, computed by adding the lower class limit to the upper class limit and dividing by 2

47

For the given frequency distribution; Find the class width. Temperatures Frequency 32-36 1 37-41 3 42-46 5 47-51 11

5

For the data given in the table below, construct a frequency table having 4 classes. What is the upper boundary of the 2nd class? Height of Eruption (in.) 127 96 110 150 140 110 100 130 110 126 135 116 118 129 128 120 135 130 102 141

Always start with the a number below the lowest number Frequency (How Many numbers in that group) Height Frequency 95-109 3 110-123 6 124-137 8 138-152 3 2nd class the frequency is 6, the upper boundary is 123.5