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Ch 3 Review Key p2

# Ch 3 Review Key p2 - 9 The AP Statistics exam was ﬁrst...

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Unformatted text preview: 9. The AP Statistics exam was ﬁrst administered in May 1997 to the largest ﬁrst year group in any discipline in the AP program. Since that time, the number of students taking the exam has grown at an impressive rate. Here are the actual data: “5' Year 33\$: 0‘ “a IIIIIIIIII ———1997 7 667 35. IIIIIIIIII 1998 15,486 Ji'o'» 3.--------.- 1999 25,240 51:46-19 1 lll'Il-ll- 2000 35,119 ,1, m; gall-Ill...- 2001 41,609 is III-II...- 2002 50,000(est.) m :E:::::::: a) Q0nstruct_a scatterplot. Which is the explanatory ‘5' III-II...- variable, WhJCh is the response? 47 ﬂ, CH be o: 02. Bear 13 6;: pbna hr) #051 515.141; .3 has/mar 1)) Find the LSRL and correlation for the data. What does the correlation tell you? Chi" 3‘“; 09 Q7 no‘i' "197’ 102’ M04- 2019?. f: 3qu +leuw3¢ 5%, {705375141 3: #239223: + was.“ "3"" WWW “We 3““ “-1 _ _ +kea‘rsuaa ak‘ 2W: _ ﬁat M1, _ “- 1w; 23 c)5Constri1ct§re§idaiialfJ-zigt. ' I D J exam; am Match the deﬁnitions or equation to the terms — may have more that one answer for each term. 10. r2 (C. > a) y -32 1 l. Slope of LSRL(b> b) r% 12. CorrelationQSé (e5 0) the ii‘action of the variation in the values of y that is explained by LSRL 13. Inﬂuential poinﬁ) d) contains the point (.17 , l7 ) 14. Perfect correlationOJ) e) must lie between -1.0 and 1.0 15. Intercept of LSRLQ. ) f) strength and direction of a linear association 16. Residual (61) g) substantially changes the regression line 17. Least-squares lineé‘) h) r = :1:1 i) 5-1;; ...
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