Math 227 - Statistics » Spring 2023 » 02P Frequency Distributions for Organizing and Summarizing Data, Histograms, Graphs That Enlighten and Graphs That Deceive

Need help with your exam preparation?

Question #1
Quiz scores of statistics students were obtained by a teacher and listed below. Construct a frequency distribution beginning with a lower class limit of 0 and use a class width of 2. What is the lower class boundary of the first class? 6, 6, 1, 7, 4, 6, 9, 7, 5, 5
A.   1
B.   -0.5
C.   1.5
D.   0.9
Question #2
Quiz scores of statistics students were obtained by a teacher and listed below. Construct a frequency distribution beginning with a lower class limit of 0 and use a class width of 2. What is the lower class boundary of the second class? 5, 1, 9, 5, 8, 8, 2, 6, 5, 3
A.   1
B.   -0.5
C.   1.5
D.   0.9
Question #3
In a survey, 26 voters were asked their ages. The results are shown below. Construct a frequency polygon to represent the data (with 5 classes beginning with a the first data midpoint of 24.5 and a class width of 10). What is the lower class limit of the second class? 58, 26, 49, 34, 57, 26, 46, 54, 31, 56, 34, 21, 67, 62, 45, 58, 35, 32, 31, 26, 63, 32, 29, 47, 52, 42
A.   40
B.   30
C.   25
D.   50
Question #4
Quiz scores of statistics students were obtained by a teacher and listed below. Construct a frequency distribution beginning with a lower class limit of 0 and use a class width of 2. What frequency is listed for the first class? 1, 5, 5, 4, 3, 6, 8, 2, 4, 10
A.   1
B.   -0.5
C.   1.5
D.   0.5
Question #5
A frequency table of grades has five classes (A, B, C, D, F) with frequencies of 20, 3, 24, 21, and 3 respectively. Using percentages, what are the relative frequencies of the B class?
A.   4.84
B.   5.16
C.   3.24
D.   4.23

Need help with your exam preparation?