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This question was created from STAT 200_Final_Exam_Spring_2019_OL1.pdf

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This question was created from STAT 200_Final_Exam_Spring_2019_OL1.pdf
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7. A random sample of 100 customers was chosen in UMUC MiniMart between 3:00 and 4:00 PM on a
Friday afternoon. The frequency distribution below shows the distribution for checkout time (in
minutes). (Show all work. Just the answer, without supporting work, will receive no credit.)
Checkout Time (in
Cumulative Relative
Minutes)
Frequency
Frequency
1.0 – 1.9
8
2.0 -2.9
22
3.0 -3.9
0.8
4.0 -5.9
0.98
6.0 -6.9
1.00
Total
100
(a) Complete the frequency table with frequency and cumulative relative frequency. Express
the cumulative relative frequency to two decimal places.
What percentage of the checkout times was less than 3 minutes?
Which of the following checkout time groups does the median of this distribution belong
to? 1.0 -1.9, 2.0 -2.9, 3.0 -3.9, 4.0 -5.9, or 6.0 -6.9? Why?
8.
Consider selecting one card at a time from a 52-card deck. What is the probability that the first card
is an ace and the second card is also an ace? Express the probability in fraction format. (Note: There
are 4 aces in a deck of cards) (Show all work. Just the answer, without supporting work, will receive
no credit.)
(a) Assuming the card selection is without replacement.
(b) Assuming the card selection is with replacement.

 
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