The marks scored by students in a test are recorded in the table below

Calculate the median

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

The following table shows the grouped data, in classes, for the heights of 50 people. 

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 modal score is

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

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

The following data were obtained from the analysis of six observations of a variable x.

n = 6,       ∑x = 42,        ∑x² = 348

∑|x-ẋ| = 18,          ∑(x-ẋ)² = 70

The mean deviation and the variance are, respectively

The average age of 4 children is 15 years. If the ages of their parents are added, the average age is 25.
What is the age of the father if he is 4 years older than his wife?

he frequency table of the monthly salaries of 20 people is shown below. 

The pie chart illustrates the distribution of number of married men (M), married woman (W), bachelors(B), spinsters(S) and children(C) at a social event.


The angle of the sector representing spinsters is

The mean weights of three groups of students are 40kg, 45kg and 50kg respectively. If the number of students in the groups are 45, 30 and 25 respectively,
the mean weight of all the students is

Find the range of the following data
x+2,  x-5,  x+6,   x-2,   x-7,   x+3,   x-10,   x-1

The distribution of grades in a Mathematics examination taken by a class of 72 students is represented on a pie chart.
If 54 students passed the examination , the angle of the sector corresponding to the number of failures is

The table below shows the frequency distribution of a number of pets in 25 houses 



Find the median of the distribution

The table below shows the heights to the nearest cm of a group of people



Calculate the range of the distribution

The total income of a household for one year is N60,000. This amount is spent on rent(R), food(F), education for the children(E), general maintenance(G) and miscellaneous items(M).

The amount spent on miscellaneous items is

The mean of 25 numbers is 8. If the largest value 32 is removed, what is the mean of the remaining numbers?

Find the variance and the standard deviation, respectively of the data below
-3, -5, -7, 2, 5, 0, 4, 6

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

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 median of the distribution is

The weights to the nearest kg of a group of students are recorded in the following table

Calculate the median weight

The pie chart below shows the distribution of the expenditure of a household on various food items in a certain month. If N200 was spent on fruits, how much was spent on rice?

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

What is the mode of the distribution?

The following data gives the heights to the nearest metre of 55 trees

Using a working mean of 18 or otherwise, calculate the standard deviation

The following data gives the heights to the nearest metre of 55 trees

Using a working mean of 18 or otherwise , calculate the mean height