Question

Lesson If you have been outside on a cold windy day, you have experien emperature that our bodies feel when the wind blows on our skin on a com wind chill, the temperature seems to our bod dangerous. Meteorologists predict the temp outside. For example, people need to know the displays wind chills for various windsds when the outside temperature is 15 ve experienced wind chill Windchill is the our skin on a cold day. When we experience to our bodies, to be colder than it actually is. Wind chill can be very Bists predict the temperature and wind child to prepare people for how it teen xample, people need to know the wind chill as they dress for the day. The table A Find the least-squares line) 6-squares line y = + by using the statistics in the following table. The formula for the slope and y-intercept of the least-squares line is given below. Statistics Wind Speed, X Wind Chilly Mean 17.5 -11 Standard Deviation Correlation 9.35 40.97 14.09 slope: b = y-intercept: a =j-b1=_1.4316 -11-0.97X1.5 -0.97 Use the least-squares line to predict the wind chill for the wind speeds listed below. Then calculate the residuals. B y = Wind Chill Residual Predicted Value x = Wind Speed (in mph) (in "F) V- V 12 -2 -11 -17 25 -22 -26

Answer 1

sol ④ east square line is g = atbx where be slope- re sy 2 – 0,97 x 14.09 9.35 = -1.462 a= y-intercept = g- b = 11- (-1.462) (175) a = 14.585 1.585 - 1.462x

V x= wind | y=wind speed chill 1 Predicted Residual = y-y 4.725 -1.965 7.275 -0.035 - 7.345 -3.655 -14.655 -2.345 IELZ222211111? -22 -21.965 - 0.035 -26 - 29.275 3.275 No, LSR is not appropriate model, because no pattern, U the & Residual correlation plot shows as oo U

residual 30