Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables where each point represents an observation. It helps to visualize the relationship between the variables.

Tags

CCSS.8.SP.A.1

Front

What does a downward slope in a scatterplot indicate?

Back

A downward slope from left to right in a scatterplot indicates a negative correlation between the two variables.

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CCSS.HSS.ID.B.5

Front

What is a correlation coefficient?

Back

A correlation coefficient is a statistical measure that describes the strength and direction of a relationship between two variables, ranging from -1 to 1.

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CCSS.HSS.ID.C.8

Front

What does a correlation coefficient of -0.9 signify?

Back

A correlation coefficient of -0.9 indicates a strong negative relationship between two variables.

Tags

CCSS.HSS.ID.B.5

Front

What is systematic random sampling?

Back

Systematic random sampling is a method where you select every nth individual from a list or sequence, ensuring a random starting point.

Tags

CCSS.HSS.IC.B.3

Front

What is random sampling?

Back

Random sampling is a technique where each individual in a population has an equal chance of being selected, ensuring that the sample is representative.

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CCSS.HSS.IC.B.3

Front

How can you determine the average time spent on homework using a sample?

Back

You can determine the average by collecting data from a representative sample of students and calculating the mean of their reported homework times.

Tags

CCSS.7.SP.A.2

Front

What is the purpose of using a random-number table in sampling?

Back

A random-number table is used to ensure that the selection of samples is random, reducing bias in the sampling process.

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CCSS.HSS.IC.B.3

Front

What is the difference between random sampling and systematic sampling?

Back

Random sampling gives each individual an equal chance of selection, while systematic sampling selects individuals at regular intervals from a list.

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CCSS.HSS.IC.B.3

Front

What is the significance of sample size in research?

Back

Sample size affects the reliability and validity of the results; larger samples tend to provide more accurate estimates of the population parameters.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1