Maths：Statistics

Question 1

How is data collected?

Answer 1

*Using a survey
*An experiment
*Research
*Observation

Question 2

Primary Data

Answer 2

Data that we collect by ourselves.

Question 3

Secondary data

Answer 3

Data that has been collected by someone else.

Question 4

Numerical Data

Answer 4

Data made up of numbers

Question 5

Categorical Data

Answer 5

Data that doesn’t involve numbers.

Question 6

What can numerical data be?

Answer 6

Numerical data can be Discrete or Continuous.

Question 7

What is a discrete data?

Answer 7

Discrete data has gaps between the numbers.Only certain numbers can appear.

Question 8

What is a continuous data?

Answer 8

Continuous data has no gaps between the numbers.Any numbers can appear.

Question 9

When do we get continuous data?

Answer 9

*Height
*Weight
*Speed etc.

Question 10

What are the two types of categorical data?

Answer 10

There are two types of categorical data,nominal and nominal.

Question 11

If you were asked to name your favorite singer,what data is this ?

Answer 11

This question would be a nominal data.

Question 12

If you were asked to describe your interest in politics ,the possible answers would range from no interest at all to fanatical(obsessed).What data is this?

Answer 12

This would be an ordinal data.

Question 13

What does the Mode mean?

Answer 13

This is the number that appears the most.There can be more than one mode or there might be no mode.

Question 14

What does the Median (Med)mean?

Answer 14

Half of the numbers are below the median and the other half are above it .When there is an odd amount of numbers,one of those numbers is the median.E.g.5,7,10,14,20
10 is the median.
When there is an even amount of numbers ,add the two in the middle and divide by 2 .E.g.5,7,10,14,20,21
Median=10+14=24÷2=12

Question 15

What does the Mean (X̄)mean?

Answer 15

Add all the numbers then divided by the amount of numbers.