Block 58 warm ups

• Skewed Left

• Skewed Right

• skewed Up

• Symmetrical

• Skewed left

• Skewed right

• Skewed down

• Symmetrical

• Skewed left

• Skewed right

• Skewed down

• Symmetrical

• Skewed left

• Skewed right

• Skewed down

• Symmetrical

What is the purpose of z-scores?

• to describe the exact location of a score within a distribution

• to find the mean of the distribution

• to describe the shape of the distribution

• to find the standard deviation of the distribution

What is the formula to find the z-score for population?

• z=X-M

• z=σ-M/μ

• ^z/M=μ

• z=X-μ/σ

The sign of the z-score indicates whether the location is above(positive) or below(negative) the mean.

• True

• False

A data set has a mean of 290 and a standard deviation of 20. Calculate the z-score for 265.

A data set has a mean of 20 and a standard deviation of 3. Calculate the z-score for 23.

• 298

• 296

• 220

• 380