# Least Square Regression

Not what you're looking for?

A doctor wanted to determine whether there is a relation between a

male's age and his HDL (so called good) cholesterol. He randomly selected 17 of his patients and determined their cholesterol.

a. Determine the least-squares regression equation from the sample

data.

b. Compute the standard error of y'

c. Compute the standard error of the slope "b" (note y' = a + bx)

d.Construct a 95% confidence interval about the slope.

e. Suppose a 42 year old man vists the doctor's office. What would be a good guess as to the HDL cholesterol of this patient?

##### Purchase this Solution

##### Solution Summary

The solution discusses A doctor wanted to determine whether there is a relation between a

male's age and his HDL (so called good) cholesterol. He randomly selected 17 of his patients and determined their cholesterol.

##### Solution Preview

a) Assume the least-squares regression equation is Y = b X + a, we can use the formula:

Let x=X-mean(X) and y=Y-mean(Y) and mean(X)=45, mean(Y)= 44.94

b = SUM(x*y)/SUM(x^2) = ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.