Chapter 2 Vocab
Another name for standardized scores.
What are Z-Scores?
Approximately _______ percent of the data is within 1 standard deviation of a Normal Distribution.
68%
A z-score tells you the number of ___________ away from the mean a data value is.
What are standard deviations?
Brady scored 700 on the SAT math test. The distribution of SAT math test scores is approximately Normal with a mean 500 and standard deviation 100. Brady's z-score for his test is ________.
What is 2?
These markers can describe the location of a data value in a distribution by describing what proportion of the data has a lower value than it.
What is a percentile?
The GPA's of students at a high school are Normally distributed with a mean of 2.4 and a standard deviation of 0.75. The GPA threshold for the top 10% would be about... (two decimals)
What is 3.36
All types of distributions, including Normal distributions, can be drawn with this type of shape called a ...
What is a density curce?
The z-score of the 34th percentile (4 decimals)
-0.4125
A type of graph that allows us to locate percentiles by showing us the accummulating percent of observations.
What is a cummulative relative frequency graph?
The amount of area in a Normal Distribution, that exists outside of the interval z = [0,1]. (rounded to 4 decimal places)
What is 0.6587?