Statistics-Correlation-and-Regression-Regression-coefficient-v2

Document Sample

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

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