Asked Feb 7, 2019

find the standard deviation step by step. that is find the deviation of each observation from the mean, square the deviations then obtain the variance and the standard deviation.
i found the mean : 10.05
i need help finding the standard deviation and the variance


Expert Answer

Step 1

To find standard deviation we need to do following steps.

FInd the mean.

For each data point, find the square of its distance to the mean.

Sum the values from Step 2.

Divide by the number of data points-1.

Take the square root.

The formula for standard deviation (sd) is,




Step 2
Step 3

Lets take one example.

Suppose data set contains of si...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Related Statistics Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: Find the standard deviation, s, of sample data summarized in the frequency distribution table given ...

A: Using the provided formula, the sample standard deviation of the provided frequency distribution is ...


Q: Use the rank correlation coefficient to test for a correlation between the two variables. Use a sign...

A: In this question we have the ranks of judges, we need to conduct the hypothesis test to identify whe...


Q: In a recent court case it was found that during a period of 11 years 851 people were selected for gr...

A: It is given that a particular ethnicity in the population is 40%. From that ethnicity, 80% of 851 pe...


Q: 2. The following table represents the carbon emissions in millions of tons from consumption of fossi...

A: (a) Point estimate and standard deviation:Point estimate:The general formula to obtain the mean of a...


Q: See attachment for question.

A: Introduction to binomial distribution:Consider a random experiment involving n independent trials, s...


Q: A company has a price demand function P (x) = 150 − 3x for a certain product. What is the revenue fu...

A: The price demand function is provided as P(x) = 150 - 3x.The revenue function is given by,R(x) = xP(...


Q: If the probability for an event E is P(E)=0.4, then what are the odds against E?

A: Odds against an event:The odds against an event is given by the ratio of the probability of the even...


Q: Statistics Question

A: Solution:Computation of equation of the regression line:Step-by-step EXCEL procedure to find the equ...


Q: A computer system uses passwords that contain exactly 6 characters, and each character is 1 of the 2...

A:  We have to make a password of 6 digits whose digits can be 26 lowercase alphabets, 26 uppercase alp...