Can she conclude that the distribution in residence is different today at a 0.05 level of significance?
A. yes because the p-value = .0009
B. no, because the p-value = .0009
C. yes because the p-value = .0172
D. no because the p-value = .0172
Answer Key:
Feedback:
NW Oregon
SW Oregon
Central
Oregon
Eastern
Oregon
Observed
Counts
3109
902
244
102
Expected
Counts
4357*.727
= 3167.539
4357*.207=
901.899
4357*.048=
209.136
4357*.028=
121.996
Use Excel to find the p-value
=CHISQ.TEST(Highlight Observed, Highlight Expected)
p-value is < .05, Reject Ho. Yes, this is significant.
C

1.0/ 1.0 Points
Question 4 of 20
A company that develops over-the-counter medicines is working on a new product that is meant to shorten
the length of sore throats. To test their product for effectiveness, they take a random sample of 110 people and record how
long it took for their symptoms to completely disappear. The results are in the table below. The company knows that on
average (without medication) it takes a sore throat 6 days or less to heal 42% of the time, 7-9 days 31% of the time, 10-12
days 16% of the time, and 13 days or more 11% of the time. Can it be concluded at the 0.01 level of significance that the
patients who took the medicine healed at a different rate than these percentages?
Hypotheses:
H
0
: There is
__________
in duration of a sore throat for those that took the medicine.
H
1
: There is
__________
in duration of a sore throat for those that took the medicine.
Select the best fit choices that fit in the two blank spaces above.

1.0/ 1.0 Points
Click to see additional instructions
A Driver’s Ed program is curious if the time of year has an impact on number of car accidents in the U.S. They assume
that weather may have a significant impact on the ability of drivers to control their vehicles. They take a random
sample of 150 car accidents and record the season each occurred in. They found that 27 occurred in the Spring, 39 in
the Summer, 31 in the Fall, and 53 in the Winter. Can it be concluded at the 0.05 level of significance that car
accidents are not equally distributed throughout the year?
Enter the test statistic - round to 2 decimal places.
1.0/ 1.0 Points
B. a difference, no difference
C. no difference, no difference
D. a difference, a difference
Answer Key:
A
Question 5 of 20
Click to see additional instructions
A Driver’s Ed program is curious if the time of year has an impact on number of car accidents in the U.S. They assume
that weather may have a significant impact on the ability of drivers to control their vehicles. They take a random
sample of 150 car accidents and record the season each occurred in. They found that 27 occurred in the Spring, 39 in
the Summer, 31 in the Fall, and 53 in the Winter. Can it be concluded at the 0.05 level of significance that car
accidents are not equally distributed throughout the year?
Enter the test statistic - round to 2 decimal places.
Test statistic=
10.53
Answer Key:
10.53
Feedback:
Spring
Summer
Fall
Winter
Observed
Counts
27
39
31
53
Expected
Counts
150*.25 =
37.5
150*.25 =
37.5
150*.25 =
37.5
150*.25=
37.5
Test Stat =