1.The standard deviation of the diameter at breast height, or DBH, of the slash pine tree is less than one inch. Identify the Type I error. (Points : 1) [removed] Fail to support the claim σ < 1 when σ < 1 is true. [removed] Support the claim  μ < 1 when μ = 1 is true. [removed] Support the claim σ < 1 when σ = 1 is true. [removed] Fail to support the claim μ < 1 when μ < 1 is true. 2. Use the following sample sizes and numbers of successes for this question.  Medical researchers reviewing the risk of death for elderly patients taking dementia drugs found the following data. Assume a .05 significance level for testing the claim that the proportions are not equal. Also, assume the two simple random samples are independent and that the conditions np ≥ 5 and nq ≥ 5 are satisfied. Dementia Drugs Placebo Number of patients 500 450 Total deaths 23 12 Construct a 95% confidence interval estimate of the odds ratio of the odds for death in the placebo group to the odds for death in the dementia drugs group. Give your answer with two decimals, e.g., (12.34,56.78)  (Points : 0.5)       [removed] 3. Scientists, researching large woody debris (LWD), surveyed the number of LWD pieces from aerial photos taken annually for the past 35 years at two different sites. Over the 35 years of photos examined, the first site had a mean number of LWD pieces per hectare per year (LWD/ha/yr) of 3.7 pieces with a standard deviation of 1.9. The second site had a mean number of LWD/ha/yr of 4.3 with a standard deviation of 2.4. Assume a .05 significance level for testing the claim that the mean LWD/ha at the first site had less than the mean LWD/ha/yr at the second site. Also, assume the two samples are independent simple random samples selected from normally distributed populations, but do not assume that the population standard deviations are equal. Find the t test statistic. Give your answer with two decimals, e.g., 9.87 (Points : 0.5)       [removed] 4. Given: There is a linear correlation coefficient very close to 0 between black willow tree cuttings monitored for survival at 7 days and black willow tree cuttings monitored for survival at 14 days. Identify the choice below that contains a conclusion with a common correlation error. (Points : 1) [removed] Conclusion: there is not a linear relationship between the survival of black willow tree cuttings at 7 days and the survival of black willow tree cuttings at 14 days [removed] Conclusion: the survival of black willow tree cuttings at 7 days is not related in any way to the survival of black willow tree cuttings at 14 days [removed] Conclusion: an increase in the survival of black willow tree cuttings at 7 days is not linearly related to the survival of black willow tree cuttings at 14 days [removed] Conclusion: a decrease in the survival of black willow tree cuttings at 7 days is not linearly related to a decrease in the survival of black willow tree cuttings at 14 days  5. The pai.

1. 1.The standard deviation of the diameter at breast height, or
DBH, of the slash pine tree is less than one inch. Identify the
Type I error. (Points : 1)
[removed]
Fail to support the claim σ < 1 when σ < 1 is true.
[removed]
Support the claim μ < 1 when μ = 1 is true.
[removed]
Support the claim σ < 1 when σ = 1 is true.
[removed]
Fail to support the claim μ < 1 when μ < 1 is true.
2. Use the following sample sizes and numbers of successes for
this question.
Medical researchers reviewing the risk of death for elderly
patients taking dementia drugs found the following data.
Assume a .05 significance level for testing the claim that the
proportions are not equal. Also, assume the two simple random
samples are independent and that the conditions np ≥ 5 and nq ≥
5 are satisfied.

2. Dementia Drugs
Placebo
Number of patients
500
450
Total deaths
23
12
Construct a 95% confidence interval estimate of the odds ratio
of the odds for death in the placebo group to the odds for death
in the dementia drugs group. Give your answer with two
decimals, e.g., (12.34,56.78)
(Points : 0.5)
[removed]
3.
Scientists, researching large woody debris (LWD), surveyed the
number of LWD pieces from aerial photos taken annually for
the past 35 years at two different sites. Over the 35 years of
photos examined, the first site had a mean number of LWD
pieces per hectare per year (LWD/ha/yr) of 3.7 pieces with a
standard deviation of 1.9. The second site had a mean number of
LWD/ha/yr of 4.3 with a standard deviation of 2.4. Assume a
.05 significance level for testing the claim that the mean
LWD/ha at the first site had less than the mean LWD/ha/yr at
the second site. Also, assume the two samples are independent
simple random samples selected from normally distributed
populations, but do not assume that the population standard
deviations are equal.
Find the t test statistic. Give your answer with two decimals,
e.g., 9.87 (Points : 0.5)
[removed]
4.

3. Given: There is a linear correlation coefficient very close to 0
between black willow tree cuttings monitored for survival at 7
days and black willow tree cuttings monitored for survival at 14
days. Identify the choice below that contains a conclusion with
a common correlation error. (Points : 1)
[removed]
Conclusion: there is not a linear relationship between the
survival of black willow tree cuttings at 7 days and the survival
of black willow tree cuttings at 14 days
[removed]
Conclusion: the survival of black willow tree cuttings at 7 days
is not related in any way to the survival of black willow tree
cuttings at 14 days
[removed]
Conclusion: an increase in the survival of black willow tree
cuttings at 7 days is not linearly related to the survival of black
willow tree cuttings at 14 days
[removed]
Conclusion: a decrease in the survival of black willow tree
cuttings at 7 days is not linearly related to a decrease in the
survival of black willow tree cuttings at 14 days
5.
The paired data consist of the temperatures (in °F ) on randomly
chosen days and the amount a certain kind of plant grew (in

4. millimeters).
Temp
60
73
42
88
66
77
90
63
55
96
Growth
70
80
40
94
79
86
93
71
70
97
Find the predicted growth of the plant in mm if the temperature
is 75° F . Give your answer with one decimal, e.g., 98.7 .
(Points : 0.5)
[removed]
6.
Using a .01 significance level, test the claim that the
proportions of people who favor/oppose pro-choice on the

5. abortion issue are the same for the males and females.
Gender
Male
Female
Favor Pro-Choice
65
120
Oppose Pro-Choice
42
38
Do you reject the null hypothesis, at the .01 significance level?
Enter Y for yes (reject), N for no (fail to reject).
(Points : 0.5)
[removed]
7.
The table represents results from an experiment with patients
afflicted with eczema on both arms. Each patient was treated
with an immune modulator cream on one arm and a topical
steroid cream on the other arm. Using a .05 significance level,
apply McNemar's test to test the following claim: The
proportion of patients with no cure on the immune modulator
treated arm and a cure on the topical steroid treated arm is the
same as the proportion of patients with a cure on the immune
modulator treated arm and no cure on the topical steroid treated
arm.

6. Immune Modulator Cream
Cure
No Cure
Topical Steroid
Cure
25
11
Cream
No Cure
42
22
Do you reject the null hypothesis, at the .05 significance level?
Enter Y for yes (reject), N for no (fail to reject).
(Points : 0.5)
[removed]
8.
Geneticists studying carriers of genetic diseases followed
subjects subdivided by race. Researchers randomly selected
seven patients per race who had been identified as carrying a
certain gene for a genetic disease; these patients were followed
to determine the number of their siblings who also carried the
gene for the genetic disease. Use a One-Way ANOVA at a .05
significance level to test the claim that the means from the
different races are not all the same.

7. Caucasian
African-American
Other
2
0
0
3
0
1
3
1
2
3
2
2
4
2
2
5
2
3
5
4
4
Do you reject the null hypothesis, at the .05 significance level?
Enter Y for yes (reject), N for no (fail to reject).
(Points : 0.5)
[removed]
9.
Assuming calculations for a One-Way ANOVA with equal
sample sizes, if each data value in one of the samples is
increased by a fixed amount, then any change in the F test

8. statistic and the P-value is attributable only to the change in the
sample variances. (Points : 1)
[removed]
True
[removed]
False
10.
Use the following technology display from a Two-Way ANOVA
to answer this question. Biologists studying habitat use in
Lepidopteran moths measured the number of savannah moths
found at three randomly selected prairie sites with two potential
habitat interferences (expansion of row crops and grazing). Use
a .05 significance level.
Source
Df
SS
MS
F
P
Site
2
.1905
.0952
.0381
.9627
Habitat
1

9. 304.0238
304.0238
121.6095
.0000
Site*Habitat
2
.1905
.0952
.0381
.9627
Do you reject the null hypothesis anbout the habitat effect, at
the .05 significance level? Enter Y for yes (reject), N for no
(fail to reject).
(Points : 0.5)
[removed]