Sub: Statistics Topic: Regression
Question:
To find the correlation coefficient and regression coefficient
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1. The distribution of heights of adult men is approximately normal. A man whose standardized
height is 0.3 is at the 61.79th percentile. What percentile of all men are taller than he is?
A) 61.79%
B) 38.21%
C) 0.3%
D) We can’t tell from the given information.
E) We can’t tell without the normal table from the text.
Solution:
The man is at the 61.79th percentile; means there are 61.79% percent of the all men are shorter
than him. This implies (100-61.79)% = 38.21% of all men are taller than him.
Correct answer is: B) 38.21%
2. To display the relationship between per capita wine consumption and heart disease death
rates per 100,000 people. In each of 29 countries, a good choice of a graph would be a(n)
a) angiogram
b) box plot
c) histogram
d) line graph
e) scatter plot
Solution:
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Sub: Statistics Topic: Regression
Since the data is bivariate and we want to display the relationship between them.
Correct answer is: e) scatter plot
3. A s