Download Section 5.3 Finding Values

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Central limit theorem wikipedia, lookup

Section 5.3 Finding Values
Find the z-score that corresponds to the given cumulative area or percentile.
Area = 0.9099
Area = 0.0192
Find the z-score that has 12.1% of
the distribution’s area to its right.
Find the z score for which 40% of the
distribution’s area lies between –z and z
In these examples you are given probabilities and are asked to find x values.
If the average price of a new home is normally distributed with a mean of $145,000, and
standard deviation $1500, what price represents the 78th percentile?
A mandatory competency test for high school sophomores has a normal distribution with a
mean of 400 and a standard deviation of 100.
a) The top 3% of students receive $500. What is the cutoff score for receiving this
b) The bottom 1.5% of students must go to summer school. What is the
minimum score needed to stay out of this group?