Standardized test Something Great/tutorialoutletdotcom Test Z is a standardized test that all high school | Page 3

traditional curriculum. After eight weeks, all students are given a
standardized test. Consider
the table below:
Group
Treatment (x)
Control (y) Sample size
30
28 Sample mean
87
80 s
12
13 Determine whether or not these results provide evidence that mean
test scores are different for
the two populations. Here are the null and alternative hypotheses:
H0: μx = μy
H1: μx ≠ μy
According to Table D, what is the smallest α value at which you
would reject the H0?
(Remember to express your answer as a proportion.) 4. Students are
randomly assigned into a treatment group and a control group.
Members of the
treatment group use method B to learn how to read. Members of the
control group follow the
traditional curriculum. After eight weeks, all students are given a
standardized test. Consider
the table below: