WSA101 / WSA111 / WSAD101
TUTORIAL 2
Answer the following questions on Tutorial 2 by drawing a cross (x) over the letter
indicating the correct answer.
Questions 1 through 4 concern the following table:
X
4
5
6
7
8
9
10
f
1
3
2
4
4
7
5
1. For these data, n =
a) 26
b) 7
c) 49
d) cannot be determined from the table
e) None of the Above
[1]
2. The percentage of scores with X = 7 is
a) 15%
b) 38%
c) 62%
d) 24%
e) None of the Above
[1]
3. The relative frequency associated with X = 6 is
a) 0.15
b) 0.23
c) 0.08
d) 0.00
e) None of the Above
[1]
2
4. For the given data the
X
is
a) 75
b) 49
c) 204
d) cannot be determined from the table
e) None of the above
[1]
5. A distribution of scores is being organized in a grouped frequency distribution table with
an interval width of 10 points. If the lowest score in the distribution is X=41, then the
bottom interval in the table should be
a) 41 - < 50
b) 40 - < 49
c) 40 - < 50
d) 41 – 51
e) None of the Above
[1]
6. Which of the following statements is false regarding grouped frequency distribution
tables?
a) An interval width should be used that yields about 10 intervals.
b) Intervals are listed in descending order, starting with the highest value at the top of the
X column.
c) The lower apparent limit of each interval is a multiple of the interval width.
d) The value for N can be determined by counting the number of intervals in the X
column.
e) None of the Above
[1]
3
Question 7
A rugby player scored the following number of tries in his last 15 matches:
1, 1, 2, 1, 3, 2, 1, 2, 5, 1, 1, 2, 3, 1, 1
a) Construct a frequency distribution for the data. Also include Relative frequencies.
[5]
Question 8
The grades on a statistics exam are as follows.
75 66 77 66 64 73 91 65 59 86 61 86 61 58 70
97 80 58 94 78 62 79 83 54 52 45 82 48 67 55
a) Construct a frequency distribution table for the data above, using 6 class intervals.
[10]
[21]