can someone help me solve the follwoing stats questions please explaining every
ID: 3043338 • Letter: C
Question
can someone help me solve the follwoing stats questions please explaining every aspect of every step in detail
II) Suppose that for a set of 1000 measurements having a bell shaped distribution, x = 120 and s = 25. Find the approximate value of the 84th percentile of the data set.
III) An urn contains 20 objects. 7 of the objects are red, 5 are blue and the rest are green. Also the blue objects are square while the rest are round. Suppose an object is drawn from the urn at random.
a) The probability that the object drawn is blue and round is ______________.
b) Suppose that as you are drawing the object, you notice that it is red. Given this new information, the probability that the object drawn is round is ____________.
please help
Explanation / Answer
ii) as for 84th percentile ; z score =0.9945
therefore corresponding value =mean+z*std deviation =120+0.9945*25 =144.86 ~ 145
(iii)
total number of objects =20
a) probability that the object drawn is blue and round is =0/20 =0 (As all blue objects are square and none are red)
b)P(round|red )=1 (As we know that all red objects are round from above)
( please revert for any clarification)
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