Unit 4A Study Guide

Front

What is the median in a data set?

Back

The median is the middle value when the data set is ordered from least to greatest. It is less affected by extreme values than the mean.

Front

Why is the median a better measure of center in some cases?

Back

The median is a better measure of center when a data set contains outliers or extreme values, as it provides a more realistic expectation of the data.

Front

How do you calculate the expected value based on a trend?

Back

To calculate the expected value based on a trend, you can use the ratio of occurrences in a sample and apply it to the larger population.

Front

What does increasing the sample size do for survey results?

Back

Increasing the sample size generally increases the reliability of the results, making them more representative of the population.

Front

What is a survey sample?

Back

A survey sample is a subset of a population selected to represent the whole population in a study.

Front

What is bias in survey results?

Back

Bias in survey results occurs when certain groups are overrepresented or underrepresented, leading to skewed results.

Front

What is the importance of random sampling?

Back

Random sampling is important because it helps ensure that every member of the population has an equal chance of being selected, reducing bias.

Front

What does a scale of 1 to 10 represent in surveys?

Back

A scale of 1 to 10 is often used in surveys to quantify opinions or satisfaction levels, where 1 is the lowest and 10 is the highest.

Front

What is an outlier in a data set?

Back

An outlier is a data point that differs significantly from other observations in a data set, often due to variability or measurement error.

Front

How do you interpret survey results?

Back

Survey results are interpreted by analyzing the data collected, looking for trends, averages, and significant findings.