AA - Vocab Homework Week 4 - 1st 9 Weeks

A negative z-score means....

• The data point is above the mean
• The data point is close to the mean
• The data point is below the mean
• The data point is at the mean

A positive z-score means...

• The data point is close to the mean
• The data point is far from the mean
• The data point is exactly at the mean
• The data point has a value of zero

A z-score of 0 means...

• The data point is at the mean of the distribution
• The data point is at the median of the distribution
• The data point is at the mode of the distribution
• The data point is an outlier

Standard deviation can be found how on Desmos?

• By clicking on "stdev" followed by the data set

• By clicking on "stdevp" followed by the data set

• By typing in "mean" followed by the data set

• By typing in "median" followed by the data set

What percent of data falls within 1 standard deviation of the mean?

• 68%
• 95%
• 99.7%
• 50%

What total percent falls within 2 standard deviations of the mean?

• 95%
• 68%
• 99.7%
• 50%

What total percent falls within 3 standard deviations of the mean?

• 68%
• 95%
• 99.7%
• 99%

A bell-curve indicates what with distributions?

• The mean, median and mode are all equal
• The distribution is skewed
• The distribution is bimodal
• The distribution is uniform

What is the formula for z-score?

• (X - μ) / σ
• (X - σ) / μ
• (μ - X) / σ
• (σ - X) / μ

Why would you need to find the z-score?

• To determine how many standard deviations an element is from the mean
• To calculate the median of a dataset
• To find the mode of a dataset
• To determine the range of a dataset