Question

write a short note of stardand devaition in 100 words​

Answer 1

Answer:

Standard deviation is a number used to tell how measurements for a group are spread out from the average (mean or expected value). A low standard deviation means that most of the numbers are close to the average, while a high standard deviation means that the numbers are more spread out.

Explanation:

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Answer 2

Explanation:

Standard deviation is a number used to tell how measurements for a group are spread out from the average (mean or expected value). A low standard deviation means that most of the numbers are close to the average, while a high standard deviation means that the numbers are more spread out.[1][2]

A plot of a normal distribution (or bell curve). Each colored band has a width of one standard deviation.

The reported margin of error is usually twice the standard deviation. Scientists commonly report the standard deviation of numbers from the average number in experiments. They often decide that only differences bigger than two or three times the standard deviation are important. Standard deviation is also useful in money, where the standard deviation on interest earned shows how different one person’s interest earned might be from the average.

Many times, only a sample, or part of a group can be measured. Then a number close to the standard deviation for the whole group can be found by a slightly different equation called the sample standard deviation.