A. Use data set 9.3 and compute the regression line. (10 observations of aptitude and grade).

UCLA Ial Graph - Graph X Notes : File Edit Object Graph Tools Help 1. Unicode is supported; see help unicode_a Checking for updates. . . Graph X (contacting http://www.stata.com) Update status 100 Last check for updates: 24 Nov 2021 New update available: 17 Nov 2021 (what's Current update level: 14 Jun 2021 (what's Possible actions 8- Install available updates (or typ Click to edit automatic update checking preferenc use "C:\\Users\\YH789961\\Downloads\\9.3.dta" scatter aptitude grade | | Ifit aptitude grade Command 60 70 80 90 100 grade aptitude Fitted valuesCurrent update level: 14 Jun 2021 (what's new) Possible actions Install available updates (or type -update all-) Click to edit automatic update checking preferences use "C:\\Users\\YH789961\\Downloads\\9.3.dta" scatter aptitude grade | | Ifit aptitude grade regress aptitude grade Source SS df MS Number of obs 10 F (1, 8) 9.81 Model 531. 216626 1 531.216626 Prob > F 0.0140 Residual 433.183374 8 54.1479218 R-squared = 0.5508 Adj R-squared = 0. 4947 Total 964.4 9 107.155556 Root MSE 7.3585 aptitude Coefficient Std. err. t P> | t/ [95% conf. interval] grade . 7207824 . 2301226 3.13 0.014 - 1901188 1.251446 _cons 23.0978 18.44214 1.25 0.246 -19.42985 65.62545College Station, Texas : lal Graph - Graph O X 800-STATA-PC http 979-696-4600 File Edit Object Graph Tools Help stat Stata license: 124-student lab perpetual Serial number: 301706309727 Graph X Licensed to: SSCERT UCLA 100 Notes: 1. Unicode is supported; see help unicode_advice. 2. New update available; type -update all- 8- use "C:\\Users\\YH789961\\Downloads\\9.4.dta" scatter language_score group | | Ifit language_score group 8- Command 8- 1.5 2 2.5 Group Language_Score Fitted values. use "C:\\Users\\YH789961\\Downloads\\9.4.dta" . desc Contains data from C:\\Users\\YH789961\\Downloads\\9.4.dta Observations : 30 Variables: 2 29 Nov 2020 23:34 Variable Storage Display Value name type format label Variable label group byte %8.0g Group language_score byte *8.0g Language_Score Sorted by: . scatter language_score group | | Ifit language_score group oneway language_score group Analysis of variance Source SS df MS F Prob > F Between groups 1133.06667 2 566.533333 8.80 0. 0011 Within groups 1738.4 27 64. 3851852 Total 2871.46667 29 99. 016092 Bartlett's equal-variances test: chi2(2) = 12.2786 Prob>chi2 = 0.002