The heights in cm, of 10 children are 145, 163, 159, 162, 167, 149, 150, 160, 170, and 155. The standard deviation of the heights of the children is

_________ are used when you want to visually examine the relationship between two quantitative variables.

One of these is not a desirable feature of a good statistical table

A dealer increased the price of an item by 20%, and then increased the price of the same item by 30%. If x is the original price, what is the price after the two increases?

Which of the following points does not lie on the line 2y + 5x -4 = 0?

If un = 2, 6, 10, ..., the last tem of the sequence is 90. The number of terms in the sequence is

Find the value of p, if the line which passes through (-1, p) and (-2p, 2) is parallel to the line 2y + 8x - 17 = 0.

Find all the values of $x$ satisfying the inequality $-14\le 4-3x\le 31$

No of children: 0, 1, 2, 3, 4, 5, 6
No of families: 7, 11, 6, 7, 7, 5, 3
Find the mode and median respectively of the distribution above.

In a class, 120 students speak English or French or both. 70 speak English and 55 speak French. How many speak English but not French?

If un = 2, 6, 10, ..., the 12th term of the sequence is

Find the sum to infinity of the following series 3 + 2 + 4 + 4/3 + 8/9 + 16/27 + ......

P is the point (3, 5). Q is the point (-1, 9). R is the midpoint of PQ. Which one of the following lines does R lie on?

Given the list of numbers {1, 6, 3, 9, 16, 11, 2, 9, 5, 7, 12, 13, 8}, what is the median?

Two dice are thrown. What is the probability that the sum of the two numbers obtained is greater than 10?

In an arithmetic sequence with 25 terms, if the first term is 60 and last term is -12, the sum of the terms of the sequence is

The heights in cm, of 10 children are 145, 163, 159, 162, 167, 149, 150, 160, 170, and 155. The mean height of the children is

Rationalize $\frac{(4\sqrt{7}+\sqrt{2})\; /}{(\sqrt{2}-7)}$

What is the slope of the line that is perpendicular to y - 2x = 1?

If y = 5cos(-6x), dx/dy is

The length of a rectangle is three times its width. If the perimeter is 72 cm, the width of the rectangle is

Ann goes swimming regularly. She wants to improve her fitness, so she decides to swim 10 lengths in the first session and increase the number of lengths she swims by 2 every session. When she reaches 50 lengths in a session she will not increase the number any further. If Ann asks her friend Joy to come swimming with her, Joy starts coming at Sue’s 8th session. Joy starts to swim 15 lengths and increases the number of the lengths by 5 each time. After how many of Joy’s sessions does she swim the same number of lengths as Ann?

Find the distance between points A(-4, 5) and B(-3, 2).

Statistics is a set of tools whose proper use will _______ the decision maker.

Paul and his friend, Peter went to buy an article costing ₦600. Peter had 10% of the cost and Paul, 40% of the remainder. How much did they have altogether?

Ann goes swimming regularly. She wants to improve her fitness, so she decides to swim 10 lengths in the first session and increase the number of lengths she swims by 2 every session. When she reaches 50 lengths in a session she will not increase the number any further. Ann decides she will give herself a reward
when she has swum a total of 400 lengths. After how many sessions does she get her reward?

A housewife bought five yams at Y34 per yam and three oranges at Y5 each where Y is the currency reckoned in base six. The total amount spent by the housewife is

The graph of cumulative frequency distribution is called

If un = 2, 6, 10, ..., the sum of the terms of the sequence above is

In an arithmetic sequence whose 4th term is 14 and whose 11th term is 70, the sum of the first 12 terms of the sequence is

As a general rule, the _______ is the best measure of central tendency because it is more precise.

List the integral values of which satisfy the inequality $-2<7-3x\le 10$.

In a survey of villagers, it is found that 20% of the people have visited Kano and 25% have visited Port Harcourt. If 5% have been to both cities, then the percentage that have visited neither Kano nor Port Harcourt is

Find the variance of the numbers k, k + 1, k + 2.

In an arithmetic sequence whose 4th term is 14 and whose 11th term is 70, the first term and common difference are

A is the point (1, 5), B is the point (4, 7) and C is the point (5, 2). Triangle ABC is

Find the point on the Euclidean plane where the curve y = 2x² - 2x + 9 has 2 as gradient.

Find the number of sides of a regular polygon whose interior angle is twice the exterior angle.

Divide the L.C.M. of 36, 54 and 90 by their HCF.

The lengths of the sides of a right-angled triangle are ym, (3y - 1)m and (3y + 1)m, find y.