1. Are higher than average sea surface temperatures associated with a greater th

Question

1. Are higher than average sea surface temperatures associated with a greater than average number of hurricanes each year? In a 2010 study, the average global sea surface temperature anomaly was recorded, along with the number of Atlantic hurricanes above or below the average for that year. The response variable is:
A. number of hurricanes above or below average.
B. the global sea surface temperature anomaly.
C. the number of hurricanes used in the study.
D. None of the answer options is correct.

2. If a data set consists of three variables measured on each of 20 individuals, how many dots are in the scatterplot?  
A. 10
B. 20
C. 40
D. 60

3. Given this regression line: =50.24 .0056( ) Calculate the predicted value of MPG value when the Weight is 3200 pounds. A. 32.32
B. 24.14
C. 28.2
D. 68.16

4. Given this regression line:      y = –12 + 3.8x, where, y = motor vehicle fatalities (per 100,000 residents) and x = percent population for ages 18–24. For every one unit increase in x, the model predicts _________ change in the predicted value of y.  
A. 3.8
B. –12
C. –12 + 3.8x  
D. 3.8 * (–12)

Explanation / Answer

Question-1

Part-A is answer as surface temperature is used to predict number of hurricanes

Question-2

Part-B as there are 20 indviduals so there are 20 pairs in scatter plot

Question-3

Part-A is answer as predicted value=50.24-0.0056*3200=32.32

Question-4

Part-A is answer as it is the definition of slope.

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