The table below shows the marks obtained by 8 students taking English and Physics


Calculate the mean for Physics

The diagram illustrates the distribution of marks in a class test



The total number of students who sat for the test is

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

Find the range and interquartile range, respectively, of the following data
5, 7, 2, 8, 9, 5, 7, 7, 10, 3, 6, 6

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 representing the total number of married persons is

The scores of a group of students are
4, 5, 6, 7, 8.
The standard deviation is

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

Class                 1-3           4-6          7-9
Frequency        5               8             5

The standard deviation of the frequency distribution in the table above is

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



Find the mode of the distribution

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

Calculate semi interquartile range

In a class of 20 students the scores in a Mathematics test out of 10 marks are as follows:
5, 3, 6, 7, 8, 4, 5, 4, 9, 3, 4, 6, 4, 5, 7, 4, 5, 6, 7, 2

The range of the distribution is

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



Calculate an estimate of the mean

Find the mean and  mean deviation, respectively of the following 
16, 18, 12, 14, 20, 25, 13, 15, 11

The following marks were obtained by candidates in an examination 
Calculate the median

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 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

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

Calculate the difference between the mean deviation and the standard deviation

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

Calculate an estimate of the standard deviation

The following are measures of central tendency except

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?

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 table below shows the marks obtained by 8 students taking English and Physics

The standard deviation for Physics is

In a certain country last year a total of 500 million tons of trash was recycled. The chart below shows the distribution, in millions of tons, for the different types of trashes. 

 

How many tons of Iron/Steel was recycled?

Find the mean and  mean deviation, respectively of the following 
5, -3, 6, -2, 4, -8, 4, 7, -10, 10

The mean of the prime number 1 and 20 is 77/8. When another prime number is added, the mean becomes 40/3 find the new prime number