The lower and upper quartile of a normal distribution are 20 and 40 find median.
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Answered by
3
Answer: 30
Step-by-step explanation:
Answered by
0
Answer:
sorry
the mean is 30 (halfway between quartiles).
You then turn 40 into Z score : (40-30)/SD
P(Z<(10/SD) = 0.75
then read off Z value for 0.75 from table and then equate to 10/SD and find SD
Step-by-step explanation:
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