Statistics

Question 1

Sampling Error

Answer 1

Characteristic of sample differs from population

This is a random error and will occur from even well chosen samples

Question 2

Measurement Error

Answer 2

Defers to inaccuracies in measurement of data

An example is measuring height to the nearest cm instead of mm

This also refers to questions in a non neutral tone

Question 3

Coverage Errors

Answer 3

When a sample does not actually reflect the population

To avoid this samples need to be longer and unbiased

Question 4

Non-Response errors

Answer 4

When a large number of people do not respond to a survey

E.g. the elderly online ir satisfied customers

Question 5

Simple Random Sampling

Answer 5

Designate every member of population a number

Use a random number generator to select
Infinity many as you want in the sample

If a number repeats, draw again

Question 6

Systematic Sampling

Answer 6

Order the population by a data category

Select members to sample at regular intervals

E.g. sampling cars yhrough an intersection

Question 7

Convenience Sampling

Answer 7

Chose a sample of people likely to respond

Chose hy, not on phone, easy to engage

Question 8

Stratified Sampling

Answer 8

Divide Population into subgroups

Choose an amount from each subgroup proportionally to their size stratified

Question 9

What different types of Sampling are there?

Answer 9

Stratified Sampling

Convenience Sampling

Systematic Sampling

Simple Random Sampling