# OCR Maths Stats 1

Flash cards for the basics of Stats 1

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• Created by: Ellen
• Created on: 31-03-13 11:50
(n+1)/2
How do you find the median?
1 of 24
3(n+1)/4
How do you find the upper quartile?
2 of 24
(n+1)/4
How do you find the lower quartile?
3 of 24
Qualiative data
Data that cannot take a numerical value is
4 of 24
Quantitative data
Data that can take a numerical value is
5 of 24
Data with clear steps between values
Discrete data is
6 of 24
Quantitative data that takes any value within a given range
Continuous data is
7 of 24
Outlier
An observation that lies beyond the limit of most of the recorded data is known as what?
8 of 24
Interquartile range
What is not affected by outliers?
9 of 24
When the result is within the range of recorded data
When does interpolation occur?
10 of 24
When the result is outside the range of recorded data
When does extrapolation occur?
11 of 24
A method to measure the spread of data
What is covariance?
12 of 24
How good the correlation is
What does the accuracy of prediction depend on?
13 of 24
When the data you are presented with is already ranked
When MUST you use Spearmans rank correlation coefficient?
14 of 24
When the data is non-linear
When is the rank coefficient more accurate than the pmcc?
15 of 24
This makes the sum of the squared differences of each point above or below the line as small as possible.
What does least squares regression do?
16 of 24
Getting the best possible gradient of a line
What is least squares regression used for?
17 of 24
y = a +bx
What is the equation of a straight line?
18 of 24
X
Which value is the independent value?
19 of 24
Aims to minimise the y difference from the line
What does Y on X regression do?
20 of 24
Estimating X for a given Y
X on Y regression is used for...
21 of 24
These are the results from a trial
What are outcomes?
22 of 24
Mutually exclusive events
Events that cannot happen at the same time
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The outcome of one trial does not affect the outcome of another
What are independent events?
24 of 24

## Other cards in this set

### Card 2

#### Front

How do you find the upper quartile?

3(n+1)/4

### Card 3

#### Front

How do you find the lower quartile?

#### Back ### Card 4

#### Front

Data that cannot take a numerical value is

#### Back ### Card 5

#### Front

Data that can take a numerical value is

#### Back 