6-2: Draw Inferences from Data

Front

What is an inference in data analysis?

Back

An inference is a conclusion drawn from data analysis, often based on patterns or trends observed in the data.

Front

What does median value represent in a data set?

Back

The median value is the middle number in a sorted list of numbers, which divides the data into two equal halves.

Front

How can you determine if one group has more calls than another using median values?

Back

By comparing the median values of the two groups; the group with the higher median generally receives more calls.

Front

What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger population, where each individual has an equal chance of being selected.

Front

Why is it important to use a random sample when making inferences?

Back

Using a random sample helps ensure that the data is representative of the entire population, reducing bias in the results.

Front

What does it mean if a group has a higher variability?

Back

Higher variability means that the data points in the group are more spread out from the mean, indicating greater differences among the data.

Front

How can you estimate the number of students attending summer camp based on a survey?

Back

You can use the proportion of surveyed students who attend summer camp to estimate the total number by scaling up to the entire population.

Front

What is the range in a data set?

Back

The range is the difference between the highest and lowest values in a data set.

Front

What does a smaller range indicate about a group's variability?

Back

A smaller range indicates lower variability, meaning the data points are closer to each other.

Front

What is the significance of comparing medians between two groups?

Back

Comparing medians helps to understand which group tends to have higher or lower values, providing insights into their characteristics.