Front

What is the chi-squared analysis?

Back

A statistical method used to determine if there is a significant association between categorical variables by comparing observed and expected frequencies.

Tags

NGSS.HS-LS4-3

Front

Why is it important for all data to be expressed in the same units before analysis?

Back

To ensure accurate comparisons and calculations, as differing units can lead to misleading results.

Tags

NGSS.MS-PS3-1

Front

What is a significance level in inferential statistics?

Back

A threshold set by the researcher (commonly 0.05) to determine whether to reject the null hypothesis based on the p-value.

Front

Can the median be used in non-normally distributed data sets?

Back

Yes, the median is a measure of central tendency that can be used regardless of the data distribution.

Front

What are descriptive statistics?

Back

Descriptive statistics summarize and describe the main features of a data set, often using measures like mean, median, mode, and standard deviation.

Front

What is the difference between descriptive and inferential statistics?

Back

Descriptive statistics summarize data from a sample, while inferential statistics make predictions or inferences about a population based on a sample.

Tags

NGSS.HS-LS4-3

Front

What is a p-value?

Back

A p-value indicates the probability of obtaining test results at least as extreme as the observed results, assuming the null hypothesis is true.

Front

What does it mean if a result is statistically significant?

Back

It means that the observed effect is unlikely to have occurred by chance, based on the predetermined significance level.

Tags

NGSS.HS-LS4-3

Front

What is the purpose of a hypothesis test?

Back

To determine whether there is enough evidence to reject a null hypothesis in favor of an alternative hypothesis.

Front

What is the role of sample size in statistical analysis?

Back

Larger sample sizes generally provide more reliable estimates and increase the power of a statistical test.

Tags

NGSS.HS-LS3-3