Comparing Data

Question 1

What are independent observations?

Answer 1

Two observations, A and B, are independent if the probability of A occurring does not influence the probability of B.

Question 2

What is { } known as?

Answer 2

Sample space. Often indicates all possible outcomes.

Question 3

What are paired observations?

Answer 3

Paired observations are nature dependent.

Question 4

What is the definition of mean?

Answer 4

Sum of all values and divide by number of values.

Question 5

What is the definition of the median?

Answer 5

This is known as the middle value.

Question 6

What is the definition of the mode?

Answer 6

This is known as the most common value.

Question 7

What is the definition of standard deviation?

Answer 7

This is known as the measure of the spread of data.

Question 8

What are the main features of a box plot?

Answer 8

• Median Line

- Interquartile Range. (25th and 75th centile.)

Question 9

What is the shape of a negatively skewed diagram?

Answer 9

shape of left toes.

Question 10

What is the shape of a positively skewed diagram?

Answer 10

shape of right toes.

Question 11

What is a hypothesis?

Answer 11

This is a statement.

Question 12

What do H0 mean?

Answer 12

There is no difference between the two sets of data.

Question 13

What does H1 mean?

Answer 13

There is a difference between the two sets of data.

Question 14

What is the ‘p - value’?

Answer 14

A value which indicates the probability of our observed difference is very small -> we reject the idea that there is NO difference.