The following regression equation Y = bo +b)X +b2X2+b3X3 was based on 216 observations. The numerator and denominator degrees of freedom(respectively) for the critical value of F are: Select one: O a. 3, and 211 Ob. 4, and 211 OC. 4, and 213 Od. 3, and 212

The table lists the average monthly cost to workers for family health insurance for various years. Year, x Average Monthly Cost to Workers for Family Health Insurance $298 a) Use a graphing calculator to fit a regression line to the data. b) Predict the average monthly cost to workers for family health insurance in 2020, and compare the value with $493.3, which is obtained using the points (1,340) and (4,386). c) Find the correlation coefficient for the regression line, and determine whether the line fits the data closely. 2009, 0 2010, 1 2011, 2 340 348 2012, 3 367 2013, 4 2014, 5 386 406 a) The linear equation of the regression line that best models the data is y =x+. (Round to the nearest hundredth as needed.) b) The average monthly cost to workers for family health insurance in 2020 is predicted to be $ (Round to the nearest cent as needed.) Compare the above obtained value with $493.3 This value is $ $493.3 c) The correlation coefficient is (Round to the nearest thousandth as…

A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a person can do (y). The results of the regression were: y = a x + b a = -1.043 b = 29.088 %3D %3! r2 = 0.390625 r = -0.625 Use this to predict the number of situps a person who watches 6.5 hours of TV can do. situps : %3D [one decimal accuracy1

Ocean currents are important in studies of climate change, as well as ecology studies of dispersal of plankton. Drift bottles are used to study ocean currents in the Pacific near Hawaii, the Solomon Islands, New Guinea, and other islands. Let x represent the number of days to recovery of a drift bottle after release and y represent the distance from point of release to point of recovery in km/100. The following data are representative of one study using drift bottles to study ocean currents. x days 75 79 35 91 203 y km/100 14.2 19.1 5.8 11.2 35.4 (a) Verify that  Σx = 483,   Σy = 85.7,   Σx2 = 62,581,   Σy2 = 1978.69,   Σxy = 10982.3,  and  r ≈ 0.94895. Σx   Σy   Σx2   Σy2   Σxy   r   (b) Use a 1% level of significance to test the claim  ρ > 0.  (Use 2 decimal places.) t   critical t     (c) Verify that  Se ≈ 4.1118,   a ≈ 0.7378,  and  b ≈ 0.1698. Se   a   b