EMath Revision 2 ( Probability, Statistics )

4A SD=1.3, 4B SD=4.2. It means that Class A did better as they are more consistent.

The chances of grambling is 1/2 as you either win or lose.

10 red balls & 6 green balls. 2 balls are drawn w/o replacing.Probabilty of getting both red is

In a bag of large number of beads,the ratio of blue:red is 1: 3.Probability of drawing 2 red is

The mean in 2, 4, 31, 34, 34, 36, 37, 39, 39 would be smaller than its median.

SD age of a group of girls is 4.12. 5 years later, the SD age of the same group would

Expand and simplify ( x - 1) ² -x^2.

In this data of numbers, 1, 12, 13, 14, 16, 17, 18 , it is not wise to use mean because

The lower quartile of 2, 3, 4, 4, 6, 7, is

Factorise 5x - 10 -mx + 2m

There are 10 red balls and 6 green balls. Probability of getting a red ball is

Mean age of the a group of girls is 23.5. 5 years later, the mean age of the group would

Which is the median of 2, 3, 3, 4, 6, 7,

Class A has a higher SD score than Class B. It means class A is more consistent.

Find the mean of 5, 6, 7, 11, 30

Find the SD of 5, 6, 7, 11, 30

Probability of picking a blue ball from a bag of balls is 4/5.The probability of getting 2blue

The range of 2, 3, 3, 4, 6, 7, is

Given the data : 3, 3, 4, 5, 6, 6, 30, 32, which measurement is better to say about the data.

Class A has a higher mean score than Class B. It means class A generally did better.

The probability of you passing a test is 1/2.

In a bag of beads,the ratio of blue:red is 1: 3. Probability of drawing 1 red bead is