Home › Praxis Core (Teaching) › Mathematics › The Normal Distribution › What does a z-score of exactly zero tell you abo…
What does a z-score of exactly zero tell you about a value?
AIt equals the range
BIt equals the mean
CIt equals the count
DIt equals the total
Answer & Solution
Correct answer: B. It equals the mean
1. A z-score measures the gap between a value and the mean.
2. A z-score of zero means that gap is zero.
3. So the value sits exactly at the mean, neither above it nor below it.
_Source: OpenStax High School Statistics (CC BY 4.0), section 6.1 The Standard Normal Distribution_
Related questions
Recognising the standard normal distribution matters because it can then be:The z-scores minus 2 and plus 2 correspond to which pair of original values in a distributIf about 68 percent of values lie within one standard deviation, the share lying outside tA z-score of zero corresponds to a value that is:Two normal curves with different standard deviations must still have equal:A normal distribution is often described by the shape of its curve as:The z-scores that bound the middle 99.7 percent of a normal distribution are:Between one standard deviation and two, the extra share of values captured is about: