Section I B 10 20 30 40 50 60 70 80 90 Petal Length (mm) 29. A botanist is study
ID: 3228093 • Letter: S
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Section I B 10 20 30 40 50 60 70 80 90 Petal Length (mm) 29. A botanist is studying the petal length in of two species of The boxplots above the distribution of petal lengths two samples of equal size. from species A the other from species B. ased on these boxplots, which of following is a correct conclusion about the data collected in this the (A) The interquartile ranges are the same for both samples. (B) The range for species B is greater than the range for species A. there are for species B. (C) There are more petal lengths that are greater than 70 mm for species A than (D) There are more petal lengths that are greater than 40 mm for species B than there are for species A. (E) There are more petal lengths that are less than 30 mm for species B than there are for species A.Explanation / Answer
29) The answer is E, If we look at the line in the box which represent the median which means 50% of the data is at the right and other 50% is at the left we easily conclude that E is correct.
30) The answer is B, We know that the width of interval is inversely proportional to square root of n where n is the number of observation so if we increase the number by a multiplication of 4 then the width will decrease to half.
31) The answer is A, Blocking is done to arrange similar units as groups so It would be better to keep a group of small car together, medium together and large together.
32) The answer is E, Increasing the sample size increase the power of Hypothesis test.
33) The answer is B, It is the best estimator as the frequency is maximum at 0.
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