A particular deviation is positive if the corresponding x value is greater than x bar and negative if the x value is less than x bar

The standard deviation of the widths (in cm) of a group of 25 leaves is 0.9 cm. What is the variance of their widths?

The heights of a group of 6 people are 150 cm, 1 55 cm, 160 cm, 165 cm, 170 cm, and 175 cm. Find the standard deviation of their heights.

Calculate the deviation in marks obtained by them.

Find the standard deviation of the following data (rounded off to two decimal places). 5,3,4,7

If the standard deviation of a, b and c is t, then what will be the standard deviation of a + 6, b+6 and c+ 6 ?

empirical rule applies only to a specific type of distribution called a bell - shaped distribution .

What is the variance of first five positive integers?

A committee has 6 members having weights (In kg) as 45, 50, 65, 72, 63, 35. Find the stander deviation

Chebyshev's theorem gives a lower bound for the area under a curve between two points that are on opposite sides of the mean and at the same distance from the mean.

Chebyshev'sTheorem : For any number 𝑘 Smaller than 1

The average blood pressure for 4000 women wwas found to be 187 mmHg with a standard deviation of 22. IJsing Chebyshev's theorem, find at least what percentage of women in this group have a blood pressure between 143 and 231 mmHg.

stander deviation is

suppose the scores on a certain college entrance exam are roughly normally distributed with a mean of 82 and a standard deviation of 5. and certain student received a 90 on the exam, Z = ....

75, 69 ,84,112 ,74 ,104 ,81 ,90 ,94 ,144 ,79 ,98 the lower inner value is

Quartiles are the summary measures that divide a ranked data set into … equal parts

correlation coefficient is a measure of linear association between ......... variables.

123, 156 ,180 ,190 ,267,290, 300, 322 ,342 ,365 ,395 Q 1 is

In quartiles The data should be ranked in increasing order before the quartiles are determined