b) an ordinal categorical variable lisorete numerical variable d) continuous num
ID: 3336424 • Letter: B
Question
b) an ordinal categorical variable lisorete numerical variable d) continuous numerical variable Use the following data to answer the next two questions 21 11 20 23 12 13 32 22 17 11. (opt) Find the interquartile range 8 32 c) 15 d) None of the above 12. (5pt) If the value 11 is replaced by -110 in this data set, which of the following values will change the most? a)he third quartile the first quartile c) mean d) median 13) If P(A) = 0.50, P(B) = 0.8, find P(A or B) if A and B are independent. a) 0.13 b) 1.30 d) None of the aboveExplanation / Answer
The sorted data is 11 12 13 17 20 21 22 23 28 32
11. Q1 = 3rd score = 13 Q3 = 8th score = 23
Median Q2 = (20 + 21) / 2 = 20.5
Interquartile range = Q3 - Q1 = 23 - 13 = 10.
The correct answer is B.
12. The new values are -110 12 13 17 20 21 22 23 28 32
Q1 = 3rd score = 13 Q3 = 8th score = 23
Median Q2 = (20 + 21) / 2 = 20.5
Mean changes as it it is the average of all values.
The correct answer is c)
13. Since A and B are independent, P(A and B) = P(A) P(B)
= 0.5 * 0.8 = 0.4
P(A or B) = P(A) + P(B) - P(A and B)
= 0.5 + 0.8 - 0.4
= 0.9
The correct answer is c)
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