Use the box-and-whisker plot below to determine which statement is accurate. A)
ID: 3265376 • Letter: U
Question
Use the box-and-whisker plot below to determine which statement is accurate. A) About 25% of the adults have cholesterol levels of at most 211. B) One half of the cholesterol levels are between 180 and 197.5. C) About 75% of the adults have cholesterol levels less than 180. D) One half of the cholesterol levels are between 180 and 211. Find the z-score for the value 62, when the mean is 79 and the standard deviation is 4. A) z = -4.50 B) z = -4.25 C) z = -0.73 D) z = 0.73 The test scores of 30 students are listed below. Find the percentile that corresponds to a score of 74. 31 41 45 48 52 55 56 56 63 65 67 67 69 70 70 74 75 78 79 79 80 81 83 85 85 87 90 92 95 99 A) 90th percentile B) 50th percentile C) 40th percentile D) 30th percentile A teacher gives a 20-point quiz to 10 students. The scores are listed below. What percentile corresponds to the score of 12? 20 8 10 7 15 16 12 19 14 9 A) 12 B) 25 C) 40 D) 13 A single six-sided die is rolled. Find the probability of rolling a seven. A) 0.1 B) 1 C) 0 D) 0.5 The distribution of blood types for 100 Americans is listed in the table. If one donor is selected at random, find the probability of selecting a person with blood type A+ or A-. A) 0.4 B) 0.02 C) 0.34 D) 0.06Explanation / Answer
Q10)
Option D is correct. Here Q = 180 and Q3 = 211. So , 50% of data between Q1 and Q3 are between 180 and 211
Q11) Z score = (62-79)/4
Z score = -4.25
Option B is Correct
Q12) No of elements less than 74 in the data table = 15
So, Correct option is B . 50% percentile
Q13) Data in increasing order
7 8 9 10 12 14 15 16 19 20
No of elements less than 12 = 4
So, percentile = (4/10)*100% = 40%
Correct option is C
Q14) Option C is correct. Because 7 cannot occur in the dice.
Q15) P (A+ or A-) = (34+6)/100 =0.4
Correct Option is A
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