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December 3rd, 2012, 06:54 PM   #1
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multiple choice question

A s u r v e y c l a i m s t h a t 9 o u t o f 1 0 d o c t o r s ( i . e . , 9 0 % ) r e c o m m e n d b r a n d Z f o r t h e i r p a t i e n t s w h o h a v e
c h i l d r e n . T o t e s t t h i s c l a i m a g a i n s t t h e a l t e r n a t i v e t h a t t h e a c t u a l p r o p o r t i o n o f d o c t o r s w h o
r e c o mm e n d br a n d Z is le ss t h a n 9 0 %, a r a n d om s a m p l e o f d oc tor s w a s t a ke n. S up p os e th e t e s t s ta ti st ic
i s z = -1.75. Ca n we c on c lu d e t ha t H0
should be rejected at the
a ) ? = . 10 ,
b ) ? = . 05 ,
and c ) ? = . 01
level?

A ) a ) n o ; b ) n o; c ) y e s
B ) a ) y e s ; b ) ye s; c ) n o
C ) a ) n o; b ) n o; c ) n o
D ) a ) y e s ; b ) ye s; c ) y e s
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