D) 12 and 99 E) 12, 92 and 99 There is a group of 180 men and 140 females. rando
ID: 2926557 • Letter: D
Question
D) 12 and 99 E) 12, 92 and 99 There is a group of 180 men and 140 females. randomly selected. Of the men, 27 are randomly selected. Of the females, 21 are Every person has been given the same chance of being in the sample. a) 10% 16) 17) Which of the following sampling techniques can be assumed to be biased? 18 I a die has a 20% chance of showing a particular face, what is the probability that in 4 tosses, this face shows up at What is this chance? b) 48% c) 30% d) 15% e) none of these a) stratified random sample b) simple random sample c) voluntary response sample d) census sample once? a) 80% b)41% c) 59% d) 99% e) 20%Explanation / Answer
16)total 48 people has been selected out of 320. therefore chance =(48/320)*100=15%
option D
17)option C is correct
18) here the right part of this question is cut down: I am assuming that we need to find probability that this face shows up at least once = 1-P( face shows up 0 times) =1-(0.8)4 =0.59
hence option C
please revert on question 18 if it is different then what has been assumed
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