Quiz5-2016FS-Key.pdf

# Quiz5-2016FS-Key.pdf - Quiz 5 I Name 1 Assume that 13 of...

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Unformatted text preview: Quiz 5 I Name 1. Assume that 13% of people are left—handed. In a random sample of n = 100 people, let 13 denote the proportion of people in the sample who are left-handed. (a) What’s the sampling distribution for 13? Specify the name of the distribution and i.l parameter values. 2 ,/\ . I N M( .1 4w Mm @747): (m to 00/151 / /4—--=" _ i (b) What’s the probability the sample proportion is less than 0 1? 0' c; gé L 1 i w<42 1111.421 441,412,042242 .1 I?!” 00 0321(7111 . - — 3 2. Roll an un air sif— sided die ( e probablllties glven below) 64 times and let X denote the average of the rolls. Note that the mean and standard deviation of the following distribution table is 2.75 and 1.512 respectively. (a) What IS the probability that the average is between 3 and 4? i \7 i: (b) How Slang; timemuld you roll the die to be 95% certain the average will fall 4 between 2. 25 and 3. 25? ‘2 [WNW/71(1) 0%} L7,) Elf/é 2 16 (1572‘) 3915:)[7155éi ...
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