longer than 7.7 seconds. What would you use for the alternative hypothesis?
A.H
1
:
< 7.7 seconds
B.H
1
:
7.7 seconds
C.H
1
:
= 7.7 seconds
D.H
1
:
> 7.7 seconds
Answer Key: D

Question 8 of 20
1.0/ 1.0 Points
The hypothesis that an analyst is trying to prove is called the:

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.
What is your conclusion?

B.Reject H
0
. There is enough evidence to support the claim that the proportion of students
planning to go to college is now greater than .79.
C.Do not reject H
0
. There is not enough evidence to support the claim that the proportion of
students planning to go to college is greater than .79.
D.More seniors are going to college
Answer Key: C
Question 10 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 11 of 20
1.0/ 1.0 Points
A two-tailed test is one where:
A.results in either of two directions can lead to rejection of the null hypothesis
B.no results lead to the rejection of the null hypothesis
C.results in only one direction can lead to rejection of the null hypothesis
D.negative sample means lead to rejection of the null hypothesis

Answer Key: A

Part 2 of 3 -
6.0/ 6.0 Points
Question 12 of 20
1.0/ 1.0 Points
Accepted characters
: numbers, decimal point markers (period or comma), sign indicators (-), spaces
(e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).
NOTE:
For scientific
notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x
has a normal distribution with
= 2.8%. A random sample of 16 Australian bank stocks has a sample