Question 7 of 20
1.0/ 1.0 Points
In an article appearing in
Today’s Health
a writer states that the average number of calories in a
serving of popcorn is 75. To determine if the average number of calories in a serving of popcorn
is different from 75, a nutritionist selected a random sample of 20 servings of popcorn and
computed the sample mean number of calories per serving to be 78 with a sample standard
deviation of 7.
At the
= .05 level of significance, does the nutritionist have enough evidence to reject the
writer’s claim?
A.No
B.Cannot Determine
C.Yes
Answer Key: A

Question 8 of 20
1.0/ 1.0 Points
A two-tailed test is one where:

Question 9 of 20
1.0/ 1.0 Points
Results from previous studies showed 79% of all high school seniors from a certain city plan to
attend college after graduation. A random sample of 200 high school seniors from this city
reveals that 162 plan to attend college. Does this indicate that the percentage has increased from
that of previous studies? Test at the 5% level of significance.
State the null and alternative hypotheses.

Question 10 of 20
1.0/ 1.0 Points
The alternative hypothesis is also known as the:

Question 11 of 20
1.0/ 1.0 Points
Results from previous studies showed 79% of all high school seniors from a certain city plan to
attend college after graduation. A random sample of 200 high school seniors from this city
reveals that 162 plan to attend college. Does this indicate that the percentage has increased from
that of previous studies? Test at the 5% level of significance.
What is the p-value associated with your test of hypothesis?

A.0.6874
B.0.7563
C.0.4874
D.0.2437
Answer Key: D

Part 2 of 3 -
6.0/ 6.0 Points