STAT 200 Final Exam (FALL 2016) STAT 200 Final Exam 2016 | Page 4

1000 adults. (Show all work.)
IQ Scores Frequency Relative Frequency
50 - 69

23

70 - 89

0.250

90 -109

448

110 - 129
130 - 149
Total

25
1000

(a) Complete the frequency table with frequency and relative frequency. Express the relative
frequency to three decimal places.
(b) What percentage of the adults in this sample has an IQ score of at least 90?
(c) Does this distribution have positive skew or negative skew? Why or why not?
6. Consider selecting one card at a time from a 52-card deck. What is the probability that the
first card is from the suit of hearts and the second card is also from the suit of hearts? (Note:
There are 13 cards from the suit of hearts in a deck of cards) (Show all work.)
(a) Assuming the card selection is without replacement.
(b) Assuming the card selection is with replacement.
7. There are 1000 students in a high school. Among the 1000 students, 250 students take
AP