Inferences

Front

What is an inference?

Back

An inference is a conclusion reached based on evidence and reasoning rather than from explicit statements.

Front

What is proportional reasoning?

Back

Proportional reasoning involves using ratios and proportions to solve problems or make predictions.

Front

How do you predict the number of items in a larger group based on a sample?

Back

To predict the number of items in a larger group, use the ratio of the sample to the total sample size and apply it to the total population.

Front

What does it mean for a sample to be representative?

Back

A representative sample accurately reflects the characteristics of the larger population from which it is drawn.

Front

Why is it important to have a large sample size?

Back

A larger sample size generally provides more reliable results and reduces the impact of outliers.

Front

What is the formula to estimate the number of students who would vote for a candidate based on a survey?

Back

(Number of students who said yes in the sample / Total number of students surveyed) x Total number of students in the population.

Front

If 4 out of 5 doctors prefer a medicine, what does this imply about the sample?

Back

This implies that the sample may not be representative of all doctors, as it is based on a small number of responses.

Front

What is the significance of random sampling?

Back

Random sampling helps ensure that every member of a population has an equal chance of being selected, which enhances the validity of the results.

Front

How can you determine the number of adult tickets sold if you know the total tickets sold?

Back

Use the proportion of adult tickets from a sample to estimate the number of adult tickets sold in the total.

Front

What is the best way to ensure accurate inferences in research?

Back

Use a sufficiently large and representative sample to draw conclusions.