# Statistics S1 Quiz

Revision Quiz for S1 Statistics+

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A Mathematical Model is
a simplification of a real world situation
1 of 18
One disadvantage of a mathematical model is
they only work for a restricted set of variables
2 of 18
When using coding the mean must be
uncoded completely
3 of 18
Standard deviation is uncoded by
multiplying or dividing only
4 of 18
mode>median>mean means that the distribution is
negatively skewed
5 of 18
If Q2-Q1<Q3-Q2 then the distribution is
positively skewed
6 of 18
For a histogram data needs to be
continuous
7 of 18
A tree diagram shows
probability of events
8 of 18
Mutually Exclusive events have
no outcomes in common
9 of 18
Events are independent if they have
no effect on each other
10 of 18
r=-1 implies
perfect negative correlation
11 of 18
The equation of the line of regression is
y=a+bx
12 of 18
Extrapolation is unreliable because
the value is outside the range of the data
13 of 18
A Sample Space is
a list of all possible outcomes
14 of 18
A Random Variable may be
discrete or continous
15 of 18
E(aX+b) =
aE(X)+b
16 of 18
When all the probabilities are the same the discrete random variable is
uniform
17 of 18
The normal distribution Z has
mean 0 and standard distribution 1
18 of 18

## Other cards in this set

### Card 2

#### Front

One disadvantage of a mathematical model is

#### Back

they only work for a restricted set of variables

### Card 3

#### Front

When using coding the mean must be

### Card 4

#### Front

Standard deviation is uncoded by

### Card 5

#### Front

mode>median>mean means that the distribution is