Statistics Fundamentals Unit 5 Challenge 5, with Answers

Statistics Fundamentals Unit 5 Challenge 5
What is NOT assumed before starting an ANOVA test?
a.)
The population standard deviations are similar.
b.)
Populations are normally distributed.
c.)
The population means are the same.
d.)
The observations are independent and from a random sample.
c.)Correct.
A one way ANOVA is used to test the differences in population mean values. So we
don't assume they are the same. We are testing to see if there is evidence if they
are the same or different.

Which of the following is an example of a two-way ANOVA test?
a.)
Comparing the number of hours that freshman and seniors study during a
semester.
b.)
Analyzing the number of hours that freshman, sophomores, juniors, and seniors
study in a semester as well as the number of hours of sleep each group gets at
night.
c.)
Comparing the number of hours of sleep for freshman, sophomores, juniors, and
seniors.
d.)
Studying the number of hours of sleep for freshmen, sophomores, and juniors.




Karen recorded the results for a sample of 518 candies.


Color Counts Sample Proportion ( )
Red 130 25%
Yellow 109 21%