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

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Solution Summary

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

... 2b: Find the equation of the least squares regression line that ... and the other with 1,200 square fee that ... Linear Relationship Summary Revisiting R-squared and p ...

... an overview of sequential least squares regression (linear) and ... for logistic regression (R-square equivalents ... sort of info by examining the squared semi-partial ...

... SST=143. R Square = 1- (24/143) = 0.8321. ... 83.21% of y is explained by the regression equation. 2. A. Determine the least squares regression line and calculate r. ...

... 1. The least squares regression line give above is said to be a line which best ... because the line has an equation that minimizes the Sum of square of residuals ...

... 3.Write the least squares regression equation for the airport ... you see a scattergraph, a regression output tab ... and an interpretation of the R square (coeffic of ...

... The least squares regression line minimizes the residual sum of squares. ... The residual sum of squares is therefore 2 , yy ... table shows us that the square of the ...

... of the residual is residual = y - y(hat)= -13.91 4. The least square regression line give ... the line has an equation that minimizes the Sum of Squares due to ...