Data cycle Study Guide

Front

What is a biased sample?

Back

A biased sample is one that does not accurately represent the population being studied, often because it is selected in a way that favors certain outcomes.

Front

What is an unbiased sample?

Back

An unbiased sample is one that accurately reflects the characteristics of the population, allowing for valid conclusions to be drawn.

Front

What does a scatterplot show?

Back

A scatterplot is a graph that displays the relationship between two quantitative variables, showing how one variable may change in relation to another.

Front

What is the relationship between the number of school days attended and academic performance?

Back

Generally, more school days attended can lead to better academic performance, as students have more opportunities to learn.

Front

What is the significance of the amount of rainfall in relation to rainbows?

Back

The amount of rainfall can influence the frequency of rainbows observed, as rainbows typically appear when sunlight shines on water droplets in the atmosphere.

Front

How can you interpret data trends over time?

Back

Data trends can be interpreted by observing whether values increase, decrease, or remain constant over a specified period.

Front

What is the purpose of using variables in a scatterplot?

Back

Variables in a scatterplot help to identify relationships and correlations between different data points.

Front

What does it mean if a scatterplot shows a negative correlation?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What does it mean if a scatterplot shows a positive correlation?

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A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What is the importance of sample size in research?

Back

A larger sample size generally leads to more reliable and valid results, reducing the impact of outliers and variability.