Population sampling methods
is this a
| Ratio approximately 1 (Random) |
| Ratio less than 1 (Uniform) |
| Ratio greater than 1 (Clumped) |
Homework Answers
Solution
|
Sample Quadrat # |
# of Trees - x |
(x - Xbar)^2 |
|
21 |
0 |
3.24 |
|
16 |
0 |
3.24 |
|
1 |
7 |
27.04 |
|
6 |
2 |
0.04 |
|
13 |
0 |
3.24 |
|
Total |
9.00 |
36.80 |
|
Mean Xbar = 9/5 |
1.80 |
|
|
Variance s^2 = 36.8/4 |
9.20 |
|
|
Variance to Mean Ratio |
5.11 |
Answer |
DONE
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24
16
22
14
12
13
17
22
15
19
23
13
11
18
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Generally speaking, a low P/E ratio indicates a "value" or
bargain stock. Suppose a recent copy of a magazine indicated that
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human foot traffic have less woody vegetation (e.g, trees) than
hiking trails with less human traffic.
We hypothesize that there is a
difference between the amount of woody vegetation around
well-trafficked hiking trails and hiking trails with less human
foot traffic.
Perform an appropriate statistical analysis on these data.
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Recorded weight losses in lbs for 21 participants of three
different diet programs were:
a) Run Hartley’s F-max test. Does evidence
suggest the variances could be different at
the α = 5% level of significance? Explain, and show any work you
can.
b) The other ANOVA conditions (normality,
independent random samples) were reasonably
satisfied, so I ran an analysis of variance, and here is the
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