Calculator, mean , variance , standard deviation

June 15, 2021 Babad A

The use of scientific calculator to be able to get mean, variance and standard deviation of a set of numbers.

How do I calculate mean , variance , standard deviation of a set of numbers with a calculator.

 Set of numbers        Mid points     Frequency       
    0<x<2                      1                    7

     2<x< 5                    3.5                10

What is the mean and variance of these numbers?

Using a scientific calculator, we first calculate the mid point of each interval by adding the 2 numbers and divide by 2. For example on the first interval, (0+2)/2=1.

We click Menu, and 6 for Statistics.  We click 1- 1-Var and enter the mid points of each intervals given. First 1 and 3.5. Then for frequency, we enter  7 and 10. We then click OPT and click 3: 1-Variable Calc.

A list of statistical results appear on the screen.  The mean is 2.47 and the variance 1.51, standard deviation is 1.23

Thank you for watching. I hope this help.

Please feel free to contact Mrs.  A BABAD at Tutorfair , for Maths GCSE, AS/A level tutorial.



    

background

Have you thought about online lessons?

Online tuition gives you access to brilliant tutors across the country
Connect one-to-one with a tutor or share your lesson with a group for 50% of the tutor's hourly rate! Find a Tutor for One-to-One Find an Online Study Group

Want to know more?

Visit BABAD's profile to find out more and send a message.

Visit BABAD's Profile

Resources others found helpful

Exam Preparation

Getting ready for exams is about more than just being buried in books!
10 

learn more

Dyslexia Symptoms in School Children

Signs and symptoms that suggest dyslexia in school children

learn more

Intro about Dyslexia

This resource gives us a general overview of dyslexia and is a useful starting point for those who …

learn more

Verbal and Non-Verbal Reasoning Tips

Some tips for tutors and parents about how to teach and tackle reasoning for the 11+ exam and …

learn more

Free resources, revision notes and past papers for students

Find revision guides, exam papers and sample essays amongst hundreds of free resources available to students.

Find resources any subjects

Maths resources | Science resources | Music resources | Spanish resources | English resources | French resources