Group A
Brief Answer Questions
Attempt all questions.
State any two principle objectives of classification.
[2 marks]
If mean = 25, mode = 28 and standard deviation = 5, find coefficient of skewness.
[2 marks]
If the third quartile and median are 30 and 22 respectively. Find the first quartile, assuming the distribution to be symmetrical.
[2 marks]
If the quartiles coefficient of skewness is 0.6, quartile deviation is 5 and the third quartile is 28, find the median of the distribution.
[2 marks]
Given the following Regression equations, 4X - 5Y + 33 = 0; 20X - 9Y - 107 = 0. Find the mean values of X and Y.
[2 marks]
Evaluate |A| = |[1, 2, 3], [4, 5, 6], [7, 8, 9]|
[2 marks]
A card is drawn at random from a pack of cards, what is the probability of getting (a) a black card and (b) a king.
[2 marks]
Find the simple aggregative price index number from the following data of 2015 taking 2014 as base year when current year quantity is taken as weight.
| Commodities | 2014 Price | 2015 Price |
|---|---|---|
| A | 5 | 8 |
| B | 4 | 6 |
| C | 10 | 12 |
| D | 7 | 5 |
[2 marks]
Find the transpose of matrix A where A = [[1, -2], [4, 3]].
[2 marks]
The year of origin of the following trend line equation of production (in tonne's) is 2017. y = 40 + 1.5x. Estimate the production for the year 2033.
[2 marks]