/Stat._Ch._4_Final_Review_May_8

Page 1

x Sample mean for grouped data x =

Chapter 7

©xf n

Sample standard deviation for grouped data s =

©(x - x)2f ©x2f - (©xf )2!n = n - 1 n - 1 B !"#"$%&'$%(%)*+#,%-./*.0% B

Chapter 4

Pearson product moment correlation coefficient n©xy - (©x)(©y) 2

2

2

Standard deviation of x distrib

Least-squares line yn = a + bx

n©xy - (©x)(©y) n©x 2 - (©x)2

x

s!

Chapter 8 for m x - E 6 m 6 x + E where E = zc

a = y - bx

% Coefficient of determination = r 2 1$ 23%'.#/*.4%5#46%4.#,,7%86.%934.%:#63,*+.;%!8<<36.%"'#"%#%5#4%*6%5'36.+%#"% 4#+=39$%>."%?%@.%"'.%0.*:'"%3A%"'.%5#4%B*+%'8+=4.=6%3A%<38+=6CD%#+=%,."%7%@.%"'.% 9*,.6%<.4%:#,,3+%B9<:C$% % ?% EE% ((% (E% (F% (G% HG% (I% (J% K% EE% EI% 11% E1% 1J% HG% 1F% EL% )*+=%"'.%.M8#"*3+%3A%"'.%,.#6"N6M8#4.6%,*+.$%BO,.#6.%438+=%7384%A*+#,%#+60.4%"3%"03% %

z =

Confidence Interval 2

2n©x - (©x) 2n©y - (©y)

where b =

Mean of x distribution mx = m

Standard score for x;

Regression and Correlation

r =

Raw score x = zs + m

=.5*9#,%<,#5.6$C%

% % % E$ >."%?%@.%"'.%<.45.+"#:.%3A%1PN%"3%1IN7.#4N3,=6%+3"%*+%65'33,%#+=%+3"%'*:'%65'33,% :4#=8#".6$%>."%7%@.%"'.%4.<34".=%/*3,.+"%54*9.6%<.4%1GGG%4.6*=.+"6$%!./.+%69#,,% 5*"*.6%*+%Q4R#+6#6%4.<34".=%"'.%A3,,30*+:%*+A349#"*3+%#@38"%?%#+=%7S% % T% 1P$JE% 1P$JH% EE$HL% 1F$JP% EG$FE% E($(L% 1I$LF% K% 11$I1% I$EH% G$J1% 1E$IF% G$PF% J$(L% H$IJ% % &39<8".%"'.%5344.,#"*3+%53.AA*5*.+"$%BO,.#6.%438+=%7384%A*+#,%#+60.4%"3%"03%=.5*9#,% <,#5.6$C%% % % %

H$ >."%?%@.%"'.%#:.%*+%7.#46%3A%#%,*5.+6.=%#8"393@*,.%=4*/.4$%>."%7%@.%"'.%<.45.+"#:.% 3A%#,,%A#"#,%#55*=.+"6%BA34%#%:*/.+%#:.C%=8.%"3%6<..=*+:$%)34%.?#9<,.D%"'.%A*46"%=#"#% <#*4%*+=*5#".6%"'#"%HPU%3A%#,,%A#"#,%#55*=.+"6%3A%EGN7.#4%3,=6%#4.%=8.%"3%6<..=*+:$% T% EG% EI% H1% (J% JJ% P1% FJ% K% HP% EJ% 1J% 11% I% F% E% )*+=%"'.%5344.,#"*3+%53.AA*5*.+"$%BO,.#6.%438+=%7384%#+60.4%"3%"03%=.5*9#,%<,#5.6C$% % % %

s when s 1n

s when s i 1n with d.f. = n -

E = tc


Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.