Lesson 1 Stats

Question 1

What is the population?

Answer 1

• The set of things that we are interested in.

Question 2

What is the sample?

Answer 2

• A subset of the popoulation

Question 3

What is the median?

Answer 3

• The middle number or element when the data set is in order

Question 4

What is the mean?

Answer 4

• Everything divided by the population size. After being added up.

Question 5

What is the interquartile range?

Answer 5

Find the upper quartile, then find the lower quartile range. This is used to get rid of bias in votes such as the olympics.

Question 6

What are the mean, range, mode, and median all known as?

Answer 6

• Population parameters.

Question 7

What is a statistic?

Answer 7

A value taken from a single sample. One or more statistics can be used to estimate a parameter. However this estimate depends on how representative the sample is of the population.

Question 8

What is the list of population?

Answer 8

• The list that is called the sampling frame.

Question 9

What is it called when data is collected from the entire sampling frame?

Answer 9

In some instances a census, for example the whole population.

Question 10

List 3 sampling methods

Answer 10

• Simple random
• Systematic sampling
• Stratified

Question 11

What is simple random sampling?

Answer 11

-Completely random, every member of the population has an eqaul chance of being picked for sampling.

Question 12

What is systematic sampling?

Answer 12

• Having a formula for asking someone. For example asking every other ten people the question selected.

Question 13

What is stratified sampling?

Answer 13

• Sampling where it takes into account the sample size. To ensure each gruop is properly represented, the s ample must be split across differenet groups in the same proportion as in the population size.