An Introduction to Statistical Methods and Data Analysis
7th Edition
ISBN: 9781305269477
Author: R. Lyman Ott, Micheal T. Longnecker
Publisher: Cengage Learning
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A biologist wants to determine if different temperatures (15oC, 25oC, or 35oC) and amounts of sunlight (partial or full) will affect the growth of plants. He will test each combination of temperature and sunlight by randomly assigning 15 plants to each of the combinations.
What type of sampling is described in this study?
one sample
paired data
two samples
more than two samples
The yields of a genetically modified wheat (in bushels per acre) were compared for five different
varieties, A, B, C, D, and E, at six different locations. Each variety was randomly assigned to a plot at each
location. The results of the experiment are shown below. Analyze the experiment using appropriate
method.
Location
1
2
VARIETY
35.3
31.0
32.7
36.8
37.2
33.1
30.7
32.2
32.4
31.7
35.0
32.7
C
38.2
33.4
33.6
37.1
37.3
38.2
D
34.9
36.1
35.2
38.3
40.2
36.0
32.4
28.9
29.2
30.7
33.9
32.1
45.) What is the value of MSTr?
B.) 13.72
a.) 12.69
C.) 13.63
D.)35.67
46.) What is the degree of freedom of treatment?
a.) 29
b.) 5
c.) 20
d.) 4
47.) The following are true about alternative hypothesis, except:
a.) A hypothesis that the investigator is trying to reject
b.) Investigator's hypothesis
c.) There is a true relationship between variable
d.) A hypothesis that the investigator is trying to prove
48.) Wilcoxon rank-sum test deals with related variable. True or false?
AP Statis
An experiment was conducted to assess the efficacy of spraying oats with Malathion (at 0.25 lb/acre)
to control the cereal leaf beetle. Twenty farms in southwest Manitoba were used for the study. Ten
farms were assigned at random to the control group (no spray) and the other 10 fields were assigned
to the treatment group (spray). At the conclusion of the experiment, the number of beetle larvae per
square foot was measured at each farm, and a one-tailed test of significance was performed to
determine if Malathion reduced the number of beetles. In which one of the following cases would a
Type II error occur?
(a) We do not conclude malathion is effective when in fact it was effective.
(b)) We conclude malathion is effective when in fact it is ineffective.
(c) We conclude malathion is effective when in fact it is effective.
(d) We do not conclude malathion is effective when in fact it is ineffective.
(e) We conclude malathion is neither ineffective nor effective.
(at 0.25 lb/acre
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- What is an experiment?arrow_forwardList the sample space of each experiment. Selecting a letter of the alphabetarrow_forwardA government official is in charge of allocating social programs throughout the city of Vancouver. He will decide where these social outreach programs should be located based on the percentage of residents living below the poverty line in each region of the city. He takes a simple random sample of 130 people living in Gastown and finds that 25 have an annual income that is below the poverty line.arrow_forward
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