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.
At a university, the average cost of books per student has been $600 per student per semester. The Dean
of Students believes that the costs are increasing and that the average is now greater than $600. He
surveys a sample of 40 students and finds that for the most recent semester their average cost was $645
with a standard deviation of $75. What is the test value for this hypothesis test?
Test value:
3.79
Round your answer to two decimal places as necessary.

Question 16 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.
Suppose a firm that produces light bulbs wants to know whether it can say that its light bulbs typically last
more than 1500 hours. Hoping to find support for their claim, the firm collects a random sample of n = 25
light bulbs and records the lifetime (in hours) of each bulb. The information related to the hypothesis test
is presented below.
Test of H
0
:
1500 versus H
1
:
> 1500
Sample mean 1509.5
Std error of mean 4.854
What is the test value that you would use to conduct this test? Place your answer, rounded to 3 decimal
places in the blank. For example, 1.234 would be a legitimate entry.
1.957

Question 17 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.
The CEO of a software company is committed to expanding the proportion of highly qualified women in
the organization’s staff of salespersons. He believes that the proportion of women in similar sales
positions across the country is less than 45%. Hoping to find support for his belief, he directs you to test
H
0
: p
.45 vs H
1
: p < .45.
In doing so, you collect a random sample of 50 salespersons employed by his company, which is thought
to be representative of sales staffs of competing organizations in the industry. The collected random
sample of size 50 showed that only 18 were women.
Compute the test value that you would use in conducting this test. Place your answer, rounded to 3
decimal places, in the blank. For example, -2.345 would be a legitimate entry.
-1.279

Part 3 of 3 -
3.0/ 3.0 Points

Question 18 of 20
1.0/ 1.0 Points
Sample evidence is statistically significant at the
level only if the p–value is larger than
.

Question 19 of 20
1.0/ 1.0 Points
The smaller the p–value, the more evidence there is in favor of the alternative hypothesis.
True
False
Answer Key: True

Question 20 of 20
1.0/ 1.0 Points
In order to determine the p-value, it is unnecessary to know the level of significance.