Tampa University Statistics Questions

fars (-)False &
neg
157
3
24
Chapter 4
8. Use these results from the “1-Panel THC” test for marijuana use: Among 143
subjects with positive test results, there are 24 false positives; among 157
negative results, there are 3 false negative results. (Hint: you may want to
construct a table like Table 4-1 in the text). (12 points)
a. How many subjects are included in the study?
143
b. How many of the subjects had a true negative result?
157
C. What is the probability that a randomly selected subject had a true
negative result?
d. If one of the test subjects is randomly selected, what is the probability that
the subject tested negative OR used marijuana?
e. If one of the test subjects is randomly selected, what is the probability that
the subject tested positive OR did not use marijuana?
f. If one of the test subjects is randomly selected, what is the probability that
the subject did not use marijuana?
a
9. With a short time remaining in the day, a Fed Ex driver has time to make
deliveries at 6 locations among the 9 locations remaining. How many different
routes are possible? (5 points)
10. Determine the number of different ways the letters of MISSISSIPPI can be
arranged. (5 points)
CONS
וכך
OIS
Chapter 5
11. Assume that when adults with smartphones are randomly selected, 54% use
them in meetings or classes. If 20 adult smartphone users are randomly
selected, find the probability that exactly 15 of them use their smartphones in
meetings or classes. (5 points)
12. Assume that when adults with smartphones are randomly selected, 54% use
them in meetings or classes. If 12 adult smartphone users are randomly
selected, find the probability that fewer than 3 of them use their smartphones in
meetings or classes. (5 points)
Chapter 6
13. A bone mineral density test is used to identify a bone disease. The result of a
bone density test is commonly measured as a z-score, and the population of
Z-scores is normally distributed with a mean of O and a standard deviation of 1. (7
points)
a. For a randomly selected subject, find the probability of a bone density test
score less than 1.54.
b. For a randomly selected subject, find the probability of a bone density test
score greater than -1.54.
a
C. For a randomly selected subject, find the probability of a bone density test
score between -1.33 and 2.33.
70-389
390-469

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