Module 4

Question 1

o Set of data in its original form

Answer 1

Raw Data

Question 2

o Arrangements of observations according to their magnitude, either increasing or decreasing

Answer 2

Array

Question 3

o number of observations falling in the class

Answer 3

Class Frequency

Question 4

o numbers defining a class

Answer 4

Class interval

Question 5

o end numbers of the class

Answer 5

Class limits

Question 6

• halfway between the lower-class limit of the class
  and the upper-class limit of the preceding class.

Answer 6

Lower class boundaries (LCB)

Question 7

halfway between the upper-class limit of the class and the lower-class limit of the next class.

Answer 7

Upper class boundaries (UCB)

Question 8

o Computed by using the respective class limits instead of class boundaries

Answer 8

Class size

Question 9

o A class that has no lower-limit or upper-limit

Answer 9

Open-end class

Question 10

 Can be used as a first approximation to compute number of classes.

Answer 10

Sturge’s Formula

Question 11

o Number of times a value of the data occurs in the set of all outcomes to the total number of outcomes

Answer 11

Relative Frequency Distribution

Question 12

o Number of times a value of the data occurs in the set of all outcomes to the total number of outcomes times 100

Answer 12

Relative Frequency Percentage

Question 13

o Shows the accumulated frequencies of successive classes, beginning at either end of the distribution

Answer 13

Cumulative Frequency Distribution

Question 14

 Shows the number of observations greater than the Lower-Class boundary (LCB)

Answer 14

Greater than CFD

Question 15

 Shows the number of observations less than the Upper-Class boundary
(UCB)

Answer 15

Less than CFD

Question 16

 A bar graph that displays the classes on the horizontal axis and the frequencies of the classes on the vertical axis

Answer 16

Frequency Distribution Histogram

Question 17

 A line chart that is constructed by plotting the frequencies at the class marks and
connecting the plotted points by means of straight lines; the polygon is closed by considering an additional class at each end and the ends of the lines are brought down
to the horizontal axis at the midpoints of the additional classes.

Answer 17

Frequency Polygon

Question 18

 Alternative method for describing a set of data
 Presents a histogram-like picture of the data, while allowing the experimenter to retain the actual observed values of each data point
 Partly tabular and partly graphical in nature

Answer 18

Stem-and-Leaf Plot