Fecundity of white-tail deer (fawn per doe) in northeastern Minnesota is apparen
ID: 48581 • Letter: F
Question
Fecundity of white-tail deer (fawn per doe) in northeastern Minnesota is apparently related to the sum of the previous three winter monthly snow accumulations. Consider the following figure:
1) What is/are the independent variable(s)?
a) fawn per doe
b) snow accumulations
c) y = -0.06x + 1.28
d) cannot be determined
2) What is/are the dependent variable(s)?
a) fawn per doe
b) snow accumulations
c) y = -0.06x + 1.28
d) cannot be determined
3) What is the most precise description of the relationship between fecundity and snow?
a) positive
b) negative
c) y = -0.06x + 1.28
d) there is no apparent relationship
4) Is this relationship (if any) statistically significant?
a) yes, by a lot
b) yes, by a little
c) no
d) cannot be determined
5) What evidence did you use to determine your answer to the previous question?
a) y = -0.06x + 1.28
b) r2 = 0.81
c) p = 0.037
d) visual inspection of the data
6) An increase in snow accumulations of 1 m would have which of the following effects?
a) increase fecundity by 1.28 fawns
b) decrease fecundity by 0.06 fawns
c) decrease fecundity by 0.81 fawns
d) cannot be determined
7) The value 1.28 represents what in this example?
a) independent variable
b) dependent variable
c) slope
d) intercept
8) Snow accumulations explains what percent of the variation in fecundity?
a) 1.28
b) 0.81
c) 81
d) 3.7
9) What is this type of statistical analysis called?
a) correlation
b) regression
c) t-test
d) ANOVA
10) What is the null hypothesis associated with this analysis?
a) means of x and y are equal
b) variances of x and y are equal
c) no association between x and y
d) slope of line y = bx + a is zero
y-0.06x + 1.28 p2 = 0.81 p 0.037 1.0 o 0.8 a 0.6 10 12 (a) Sum of 3 previous winter snow accumulations (m)Explanation / Answer
Answer 1 b) snow accumulations
Reason - snow accumulations is an independent variable here because there is no way to control the level of snowfall each year.
Answer 2 a) fawn per doe
Reason - Fawn per doe represent the fecundity of white-tail deer which is dependent on the snow accumulation.
Answer 3 c) y = -0.06x + 1.28
Reason - This equation represents the relationship between the X coordinate (snow accumulation) and Y-coordinate (fawn per doe).
Answer 4 a) yes, by a lot
Reason - In this case, P=0.037 which means that there are nearly 94% chances of this equation/relationship being true. p represents the level of significance. much lower the p value, much higher the level of significance.
Answer 5 c) p = 0.037
Reason - In this case, P=0.037 which means that there are nearly 94% chances of this equation/relationship being true. p represents the level of significance. much lower the p value, much higher the level of significance.
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