The following are marks scored by form four student in Mathematics test.
Using an assumed mean of 54.5, calculate the a) Mean mark (4mks) b) Variance (4mks) c) Standard deviation (2mks)
PAPER 1, SECTION B, STATISTICS II, FORM 4 LEVEL, 10 MARKS A number of people are asked to cut 20cm lengths of string without measuring. Later 100 pieces are collected and measured correct to the nearest 1/10cm. the data below was collected.Using 19.7 as a working mean calculate:(a) Mean (4mks)
(b) Standard deviation (5mks)(c) State the modal class (1mk)Form 4 Mathematics
The amount of money contributed by a group of students during a fundraising for a needy student was as shown in the table below.
(a) On the grid provided draw an ogive to represent the data.
(b) Use the graph to estimate: (i) The median; (ii) The quartile deviation; (iii) The percentage number of students who contributed at least Ksh 750.50. Form 4 MathematicsForm 4 MathematicsTwo lines L1 and L2 intersect at a point P. L1 passes through the points (-4,0) and (0,6). Given that L2 has the equation: y = 2x – 2, find, by calculation, the coordinates of P. ( 3 marks) Form 4 Mathematics
The table below shows the frequency distribution of heights of 40 plants in a tree nursery.
(a) State the modal class.
(b) Calculate: (i) the mean height of the plants; (ii) the standard deviation of the distribution. (c) Determine the probability that a plant taken at random has a height greater than 40 cm. Form 4 Mathematics
The mass, in kilograms, of 9 sheep in a pen were: 13, 8, 16, 17, 19, 20, 15, 14 and 11.
Determine the quartile deviation of the data. Form 1 MathematicsSuccessive moving averages of order 5 for the numbers 9,8.2, 6.7,5.4, 4.7 and k are A and B. Given that A – B = 0.6 find the value of k. Form 4 MathematicsForm 4 Mathematics
A basket ball team scored the points in 6 matches: 10, 12, 14, 16, 28 and 30. Using an assumed mean of l5. Determine the standard deviation correct to 2 decimal places.
Form 3 MathematicsForm 2 Mathematics
The frequency table below shows the daily wages paid to casual workers by a certain company
a) In the grid provided, draw a histogram to represent the above information
b.i)State the class in which the median wage lies ii) Draw a vertical line, in the histogram, showing where the median wage lies c) Using the histogram, determine the number of workers who earn shs 450 or less per day Form 4 Mathematics
The marks scored by 40 students in a mathematics test were as shown in the table below.
a) Find the lower class boundary of the modal class
b) Using an assumed mean of 64, calculate the mean mark c i) On the grid provided, draw the cumulative frequency curve for the data ii)Use the graph to estimate the semi-interquartile range Form 4 Mathematics
The table below shows marks scored by 42 students in a test.
a) Starting with the mark of 25 and using equal class intervals of 10, make a frequency distribution table.
b) On the grid provided , draw the ogive for the data c) Using the graph in (b) above , estimate: (i) The median mark (ii) The upper quartile mark Form 4 MathematicsForm 2 MathematicsForm 4 MathematicsForm 4 Mathematics
The following distribution shows the masses to the nearest kilogram of 65 animals in a certain farm
Form 4 Mathematics
The table below shows the number of goals scored in handball matches during a tournament.
Draw a cumulative frequency curve on the grid provided
b) Using the curve drawn in (a) above determine; i) The median; ii) The number of matches in which goals scored were not more than 37; iii) The inter-quartile range Form 4 MathematicsForm 4 Mathematics |
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