Question

The s.D of 15 items is 6and if each items is decrease by 1, then standereed deviation will be

Answer 1

Standard deviation remains unchanged.

Standard deviation = 6

Step-by-step explanation:

We are given the following in the question:

Standard deviation of 15 items is 6.

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

Each observation is now decreased by 1.

If each observation is decreased by 1, then, the standard deviations remains unchanged.

There is no effect on the standard deviation of data if each observation of data is decreased or increased by a constant.

#LearnMore

The standard deviation of a set of 50 items is 6.5. If every item is increased by 5 then the standard deviation will be

https://brainly.in/question/8501475

Answer 2

Step-by-step explanation:

sd will remain unchanged if all items are increased or decreased by the same amount !