Estimating Population Proportions and Sample Data

To calculate the exact population proportion

To understand how to use random samples to estimate a population proportion

To study the history of population studies

To learn about different types of populations

10 students

15 students

20 students

25 students

Bar chart

Pie chart

Dot plot

Line graph

15 out of 100 students are vegetarians

3 out of 20 students are vegetarians

15 out of 20 students are vegetarians

3 out of 100 students are vegetarians

The student made a mistake

None of the surveyed students are vegetarians

All surveyed students are vegetarians

The sample size was too small

0.15

0.25

0.10

0.20

4 students

5 students

6 students

3 students

0.15

0.19

0.25

0.20

The sample proportions are unreliable

The sample proportions are random

The sample size is too small

The sample proportions are close to the actual population proportion

It is always exactly the same as the population proportion

It is usually close to the actual population proportion

It is based on a large sample size

It is calculated using complex formulas