Maths

>

A-Level

>

Statistical Sampling

>

Do the sta...

Question
# Do the standard deviation and mean use the same units?

2 years ago

·

2 Replies

·

3074 views

O

Otilia Friesen

2 Answers

Devan-Kumar M
Verified Sherpa Tutor ✓

Young experienced tutor w a unique understanding of exam specification

3 reviews

The standard deviation and variance have the same units or are both unitless, the same unit used for the observations within the dataset. If you were calculating the standard deviation of a dataset measuring the weight of apples, you would express the standard deviation and variance in terms of g, unless you had extremely heavy apples then kg.

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.
Simelane
Verified Sherpa Tutor ✓

Master of science to help you master maths, physics and chemistry

Yes, they have the same unit of measure.

Data are normally present as mean ± standard deviation of the same quantity. For example, a group of 100 students could be aged 13 ± 5 years, where 13 years is the mean age, and 5 years is the standard deviation of the students' ages.

I'm available for 1:1 private online tuition!

Click here to view my profile and arrange a free introduction.Think you can help?

More Maths A-Level Questions
##
Need
an A-Level
Maths
tutor?

Get started with a free online introductions with an experienced and qualified online tutor on Sherpa.

Find an A-Level Maths Tutor