2.
No. of goals 0 1 2 3 4 5
Frequency 5 6 12 10 2 1
If cF(x) is the number of goals less than or equal to x, then cF(1) and cF(3) are, respectively
4.
The scores of students in a class test are given in the table below:
Marks 1 2 3 4 5 6 7 8 9 10
Frequency 0 3 1 2 3 4 2 1 1 0
The number of students who took the test is
6.
Find the mean and mean deviation, respectively of the following
16, 18, 12, 14, 20, 25, 13, 15, 11
7.
The distribution of a housewife's expenditure on four food items is as follows:
Item A (£80), Item B (£45), Item C (£30), Item D (£25).
The sum of the angles of the sectors representing the expenditure on items B and D is
9.
The scores of students in a class test are given in the table below:
Marks 1 2 3 4 5 6 7 8 9 10
Frequency 0 3 1 2 3 4 2 1 1 0
The mean score is
10.
The prices of computers in a catalogue are: N125,000, N99,000, N125,000, N120,000, N110,000, N115,000, N130,000, N120,000, N100,000.
Calculate the mean deviation
11.
The following are measures of central tendency except
12.
A sector on a pie chart representing the number of students offering Physics has an angle 0f 24°.
If 8 students offer Physics, the total number of students in the class is
13.
Find the range of the following data
1/4, 5/8, 3/10, 2/5, 7/10, 7/8, 3/4
15.
The scores of a group of students are
4, 5, 6, 7, 8.
The standard deviation is
17.
For the set of numbers
4, 6, 2, 10, 8,
the difference between the range and the variance is
19.
The numbers 2, 5, 7, 8, 10, 15 and 13 are represented on a pie chart .
The sum of the angles representing all numbers equal to or greater than 8 is
24.
The scores of students in a class test are given in the table below:
Marks 1 2 3 4 5 6 7 8 9 10
Frequency 0 3 1 2 3 4 2 1 1 0
The number of students who scored at least 5 is
25.
The table below shows the weight distribution of a group of potatoes.
Weight(g) 1-5 6-10 11-15 16-20 21-25
No. of potatoes 3 7 5 3 2
The mean of the distribution is
