Constructing a Less Cumulative FDT

1. What is the first step in constructing a less cumulative frequency table for grouped data?

• Calculate the frequency of each class interval

• Add up the frequencies cumulatively

• Find the midpoint of each class interval

• List the class intervals in ascending order

In constructing a less cumulative frequency table, what does the first less cumulative frequency represent?

• The frequency of the first class interval

• The sum of all frequencies

• The cumulative frequency for the last class interval

• The sum of the frequencies up to and including the first class interval

If the frequency for the first class interval is 8 and for the second is 12, what is the less cumulative frequency for the second interval?

• 8

• 12

• 20

• 4

What does each value in the less cumulative frequency column represent?

• The total number of data points less than or equal to the upper limit of each class interval

• The total number of data points greater than or equal to the lower limit of each class interval

• The frequency for each class interval

• The average of all the frequencies in the data set

How do you calculate the less cumulative frequency for a new class interval?

• Add the frequency of the new class interval to the cumulative frequency of the previous class interval

• Subtract the frequency of the new class interval from the cumulative frequency of the previous class interval

• Multiply the frequency of the new class interval by the midpoint of the interval

• Use the midpoint as the cumulative frequency

What is the class width (i) given the class intervals: 150-154 and 155-159?

• 1

• 4

• 5

• 9

If the frequency of the class interval 10-20 is 15, and the less cumulative frequency for the previous interval is 50, what is the less cumulative frequency for the class interval 10-20?

• 50

• 15

• 65

• 35

Which of the following is true when constructing a less cumulative frequency for grouped data?

• The cumulative frequencies decrease as the intervals move from left to right

• The cumulative frequency always starts at 0

• The cumulative frequency for each interval is calculated independently

• The less cumulative frequency never exceeds the total number of data points

Which of the following is a key difference between a less cumulative frequency table and a more cumulative frequency table?

• The less cumulative frequency is calculated by adding, while the more cumulative frequency is calculated by subtracting

• The less cumulative frequency includes the frequency of the last class interval, while the more cumulative frequency does not

• The more cumulative frequency starts from the total and decreases, while the less cumulative frequency increases from 0

• There is no difference between the two

What's the range in the given data: 12, 18, 21, 25, 29, 24, 19, 17,28, 30,

23, 27, 33, 22, 25, 26, 33, 13, 15, 17?

• 21

• 17

• 13

• 23