Entire Course Managerial Finance

Statistics for Decision-Making

DeVry_University_Manhattan_-_MATH_221_Math_221_Week_2_lab.doc-Statistics – Lab Week 2 Math221

DeVry_University_Manhattan_-_FIN_515_MIdterm.docx-MID- TERM FIN 515/Managerial Finance 1.

Page: 1   2   ( T C O 1 ) W h a t m e t h o d o f d a t a c o l l e c t i o n w o u l d y o u u s e   t o c o l l e c t d a t a f o r a s t u d y w h e r e a p o l i t i c a l p o l l s t e r w i s h e s t o d e t e r m i n e i f h i s c a n d i d a t e i s l e a d i n g i n t h e p o l l s ? Student Answer:  use a simulation   perform an experiment   take a census   use sampling (a subset of the population is obtained; Chapter 1)   Points Received: 0 of 3   Comments: ( T C O 2 ) I n t h e y e a r 2 0 1 3 , 1 4 8 m i l l   i o n A m e r i c a n s w i l l b e e n r o l l e d i n a n H M O . T h i s s t a t e m e n t d e s c r i b e s Student Answer:  inferential statistics (use probability to infer something about the population; Chapter 1)    descriptive statistics   Points Received: 0 of 3   Comments: ( T C O 2 ) T h e n u m b e r o f c o m p l a i n t   l e t t e r s r e c e i v e d b y t h e U S P S i n a g i v e n d a y a r e Student Answer:  quantitative (use numerical measurement; Ch 1)   qualitative   Points Received: 0 of 3   Comments: ( T C O 1 ) A l o b b y i s t f o r a m a j o r a i r s p a c e f i r m a s s i   g n s a n u m b e r t o e a c h l e g i s l a t o r a n d t h e n u s e s a c o m p u t e r t o r a n d o m l y g e n e r a t e t e n n u m b e r s . T h e l o b b y i s t c o n t a c t s t h e l e g i s l a t o r s c o r r e s p o n d i n g t o t h e s e n u m b e r s . W h a t s a m p l i n g t e c h n i q u e i s u s e d ? Student Answer:  random (Each legislator has an equal chance of being selected; Ch 1)   stratified    systematic   convenience   cluster   Points Received: 3 of 3   Comments: ( T C O 2 ) T   h e a v e r a g e s a l a r y o f a l l G e n e r a l M o t o r s w o r k e r s i s $ 4 2 , 5 0 0 . T h i s n u m b e r i s a Student Answer:  parameter (calculated from the population of all GM workers; Ch 2)   statistic   Points Received: 0 of 3   Comments: ( T C O 2 ) S u b j e c t s i n a s   a m p l e , w h e n p r o p e r l y s e l e c t e d , s h o u l d p o s s e s s Student Answer:  the same or similar characteristics as the population desired. (Chapter 1)   the same number of discrete variables as the population desired.   the same qualitative characteristics as the population desired.    confounding variables that differ from the population desired.   Points Received: 3 of 3   Comments: ( T C O 2 ) S u p p o s e t h e s t a n d a r d d e v i a t i o n i s 1 2 . 4 . W h a t   i s t h e v a r i a n c e ? Student Answer:  12.4   153.76 (Ch 2: variance is the standard deviation squared)   3.52   14.6   Points Received: 3 of 3   Comments: ( T C O 1 0 ) T h i s d a t a s h o w s   t h e t e m p e r a t u r e s o n r a n d o m l y c h o s e n d a y s d u r i n g a s u m m e r c l a s s a n d t h e n u m b e r o f a b s e n c e s o n t h o s e d a y s . ( t e m p e r a t u r e , n u m b e r o f a b s e n c e s ) ( 7 2 , 3 ) , ( 8 5 , 7 ) , ( 9 1 , 1 0 ) , ( 9 0 , 1 0 ) , ( 8 8 , 8 ) , ( 9 8 , 1 5 ) , ( 7 5 , 4 ) , ( 1 0 0 , 1 6 ) , ( 8 0 , 5 ) F i n d t h e e q u a t i o n o f t h e r e g r e s s i o n l i n e f o r t h e g i v e n d a t a . Student Answer:  y = -0.4668x – 31.737   y = 31.737x – 0.4668   y = 0.4668x – 31.737 (Chapter 9)   

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