Block 1 - Statistics

Question 1

How do you find the mean?

Answer 1

Total of data the data / number of data points

Question 2

How do you find the median?

Answer 2

Find the value in the middle of a data set put in order from smallest to largest if between two numbers find the number between those

Question 3

How to find the mode?

Answer 3

Find the data value that occurs most often like a number that appears twice etc

Question 4

How do you find the range?

Answer 4

Subtract the lowest value from the highest

Question 5

How do you find the quartiles?

Answer 5

Q1
is halfway between the smallest number and Q2
Q2
is the median and the middle number
Q3
Is halfway between Q2 and the biggest number
(The data set needs to be ordered)

Question 6

How do you find the IQR (interquartile range)?

Answer 6

IQR = Q3 - Q1

Question 7

What does the symbol x̄ mean?

Answer 7

x̄ is the mean

Question 8

What does Σ (sigma) mean?

Answer 8

The total of all

Question 9

What does (x - x̄) mean

Answer 9

Subtract the mean from each data value

Question 10

Why does the n in the standard deviation formula mean?

Answer 10

Number of data points

Question 11

What are the categories of the standard deviation table?

Answer 11

x
(x - x̄) (always adds to zero)
(x - x̄) ² (this categories is never a negative)
You do this to each data value that you have put in the x column

Question 12

How do you compare averages?

Answer 12

On average… (ex) class 1 got better results than class 2
Always put on average and insert the results of the differing components

Question 13

How do you compare IQR or standard deviations?

Answer 13

Do not use on avarage when asked this

Higher IQR or standard deviation tells us that the data is
more spread
More varied
Less consistent
And lower is the opposite
Less spread etc