What is/are the independent variable(s)? Question 1 options: A) number of annual

Question

What is/are the independent variable(s)?

Question 1 options:

A)

number of annual rings

B)

number of cones

C)

both A and B

D)

width of annual rings

E)

not enough information to decide

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Question 2 (1 point)

What is/are the dependent variable(s)?

Question 2 options:

A)

number of annual rings

B)

number of cones

C)

both A and B

D)

width of annual rings

E)

not enough information to decide

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Question 3 (1 point)

What is the most precise description of the relationship between reproductive effort and annual growth for the Douglas fir?

Question 3 options:

A)

positive

B)

negative

C)

negative and linear

D)

y = -1.70x + 107.5

E)

there is no clear relationship

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Question 4 (1 point)

Is this relationship (if any) statistically significant?

Question 4 options:

A)

yes, P ? ?

B)

yes, P > ?

C)

no, P ? ?

D)

no, P > ?

E)

no, ? = 0.05

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Question 5 (1 point)

What is this type of statistical test called?

Question 5 options:

A)

chi-square

B)

correlation

C)

simple linear regression

D)

t-test

E)

analysis of variance (ANOVA)

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Question 6 (1 point)

What is the null hypothesis, H0, associated with this type of analysis?

Question 6 options:

A)

y is negatively related to x

B)

variances in y are equal for all x

C)

both A and B

D)

y is positively related to x

E)

slope of line y = bx + a is zero

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Question 7 (1 point)

What is the probability of getting the observed pattern or a more extreme result by chance, if H0 is true?

Question 7 options:

A)

0

B)

0.008

C)

0.05

D)

0.71

E)

0.95

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Question 8 (1 point)

The sample size for this analysis is _____.

Question 8 options:

A)

20

B)

32

C)

71

D)

102

E)

not enough information to decide

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Question 9 (1 point)

What is the predicted relative width of annual rings in mm for a tree producing 1000 cones?

Question 9 options:

A)

4 (x 102)

B)

10 (x 102)

C)

82.5

D)

91.5

E)

107.5

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Question 10 (1 point)

For any given tree, increasing reproductive effort by one unit is expected to have which of the following effects?

Question 10 options:

A)

increase number of cones by 100

B)

decrease width of ring by 170 mm

C)

both A and B

D)

increase width of ring by 170 mm

E)

not enough information to decide

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Question 11 (1 point)

Variation in reproductive effort explains what percent of the variation in tree ring width?

Question 11 options:

A)

0.8

B)

1.70

C)

71

D)

107.5

E)

not enough information to decide

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Question 12 (1 point)

These data _____ the existence of an energetic trade-off between reproduction and growth in the Douglas fir.

Question 12 options:

A)

prove

B)

are consistent with

C)

disprove

D)

are inconsistent with

E)

are not relevant to

A)

number of annual rings

B)

number of cones

C)

both A and B

D)

width of annual rings

E)

not enough information to decide

Energy spent on reproduction constitutes an organism's "reproductive effort". The figure below shows the relationship between reproductive effort (number of cones produced) and annual growth (as measured by radial growth) for the Douglas fir, Pseudotsuga menzieii. The line represents the general trend as defined by least-squares linear regression: y- -170x + 107.5 (n 32; 0.71; p 0.008). Answer the following questions: 120 e 115 E 110 100 35 90 85 80 75 0 2 468 10 12 14 16 18 20 22 Mean number of cones per tree (10

Explanation / Answer

Solutions would be

1) number of cones

2) width of annual rings

3) negative

4) yes, P ? ?

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