Week 8 Questions and Answers. MATH 225N MATH

Week 8 Questions and Answers Performing Linear Regressions with Technology An amateur astronomer is researching statistical properties of known stars using a variety of databases. They collect the absolute magnitude or MV and stellar mass or M⊙ for 30 stars. The absolute magnitude of a star is the intensity of light that would be observed from the star at a distance of 10 parsecs from the star. This is measured in terms of a particular band of the light spectrum, indicated by the subscript letter, which in this case is V for the visual light spectrum. The scale is logarithmic and an MV that is 1 less than another comes from a star that is 10 times more luminous than the other. The stellar mass of a star is how many times the sun's mass it has. The data is provided below. Use Excel to calculate the correlation coefficient r between the two data sets, rounding to two decimal places. ________________________________________ Correct! You nailed it. ________________________________________ Yes that's right. Keep it up! ________________________________________ ________________________________________ Yes that's right. Keep it up! ________________________________________ ________________________________________ places. Perfect. Your hard work is paying off