Purchase Solution

Least Squares Regression

Not what you're looking for?

Ask Custom Question

1. A radio disc jockey track of the number of request for songs by a certain artist and the time of day the request calls were made. The data is displayed.
Request: 9 0 10 0 5 0 9 5
Time of day: 2p.m. 3p.m. 4p.m. 5p.m. 6p.m. 7p.m. 8p.m. 9p.m
If the data were displayed on a scatter plot,could the correlation of the data be represented by a linear model? If there is a linear correlation, is there a positive or negative corralation?
Answer:
A. no reliable correlation
B. linear model with a positive correlation
C. not alinear model
D. linear model with a negative correlation

2. Early in the 1900s, an airplane manufacturer was able to increase the time its planes could stay aloft by constantly refining its techniques. Use the regression feature of a graphing utility to find the least squares regression line that fits these data. Assume t is the time aloft and y is the number of years after 1910.
Years after 1910: 1 2 3 4 5 6
Time aloft (hrs) : 0.77 1.2 2.2 3.8 4.4 5.7
Answers:
A. T=1.03y-0.51
B. T=0.93y-0.38
C. T=0.93y-0.48
D. T=1.02y-0.51

Purchase this Solution

Solution Summary

Least Squares Regression is investigated. The solution is detailed and well presented.

Solution Preview

Hello and thank you for posting your question to Brainmass!
The solution is attached below in two ...

Purchase this Solution


Free BrainMass Quizzes
Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

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.

Measures of Central Tendency

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

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.