PS_Unit 6_Extra Example_Desmos and Center/Spread Analysis

What does a frequency table summarize?

• Raw data points without any grouping.

• The average of a dataset.

• The number of times each data value occurs in a dataset.

• The range of data values.

What is the first step in calculating the mean from a frequency table manually?

• Add all the frequencies together.

• Multiply each data point by its corresponding frequency.

• Divide the sum of data points by the total number of data points.

• Find the median of the data points.

How are data values and their frequencies entered into a Desmos table

to calculate statistics for a frequency distribution?

• Data values are entered in y1 and frequencies in x1.

• Both data values and frequencies are entered in x1.

• Data values are entered in x1 and frequencies in y1.

• Both data values and frequencies are entered in y1.

Which Desmos formula correctly calculates the mean (μ) of a frequency distribution

where data values are in x1 and frequencies are in y1?

• total(x1) / total(y1)

• total(x1 * y1) / total(x1)

• total(x1 * y1) / total(y1)

• total(y1) / total(x1)

How do we use the variance to find the standard deviation (σ)?

• Standard deviation is the variance multiplied by itself.
• Standard deviation is the sum of the variance values.
• Standard deviation is the average of the variance.
• Standard deviation is the square root of the variance.