Elementary Statistics Final Exam
1. In a blood testing procedure, blood samples from 5 E) 0.472
people are combined into one mixture. The mixture
will only test negative if all the individual samples are P(positive) =
negative. If the probability that an individual sample P (at least one negative) =
tests positive is 0.12, what is the probability that the 1- P(all negative) = 1 −
mixture will test positive? 0.885^5
A) 1.00
B) 0.0144
C) 0.0000249
D) 0.528
E) 0.472
2. You roll a fair die five times. B) 0.9999
What is the probability that the numbers you roll are
NOT all 3's? P(not all 3s) =
A) 0.598 1 - P(all 3s) =
B) 0.9999 1 - (1/6)^5
C) 0.402
D) 0.0001
E) 0.833
3. At the track, a gambler bets on the wrong horse in a A) This is false reasoning
10-horse field nine times in a row. Later, when talking because there is no "law
to a friend, he said he was confident that he would pick of averages" for indepen-
the winner the next time because he was "due to pick dent events
a winner." Comment on his reasoning
A) This is false reasoning because there is no "law of
averages" for independent events
B) This is false reasoning because he doesn't appear to
be lucky
C) If he doesn't pick the winning horse next time, he
will shortly after that
, Elementary Statistics Final Exam
D) When there are 10 horses in a race & he has chosen
the wrong horse nine times in a row, he statistically
should pick a winner the next time
E) None of the above apply
4. In one city, 47.5% of adults are female, 10.2% of adults D) 0.529
are left-handed, & 4.8% are females. For an adult se-
lected at random from the city, let P (F or L) =
F = event the person is female P(F) + P(L) - P(F&L)
L = event the person is left-handed
Find P(F or L)
A) 0.577
B) 0.679
C) 0.482
D) 0.529
E) 0.6245
5. College students were given three choices of pizza A) 0.631
toppings & asked to choose one favorite. The following
table shows the results P (junior & senior) =
Given that a student's favorite topping is veggie, what junior & senior / total
is the probability that the student is a junior or a se-
nior?
A) 0.631
B) 0.208
C) 0.380
D) 0.41
E) 0.385
6. Determine which scatterplot shows the strongest lin-
ear correlation.
Which shows the strongest linear correlation?
1. In a blood testing procedure, blood samples from 5 E) 0.472
people are combined into one mixture. The mixture
will only test negative if all the individual samples are P(positive) =
negative. If the probability that an individual sample P (at least one negative) =
tests positive is 0.12, what is the probability that the 1- P(all negative) = 1 −
mixture will test positive? 0.885^5
A) 1.00
B) 0.0144
C) 0.0000249
D) 0.528
E) 0.472
2. You roll a fair die five times. B) 0.9999
What is the probability that the numbers you roll are
NOT all 3's? P(not all 3s) =
A) 0.598 1 - P(all 3s) =
B) 0.9999 1 - (1/6)^5
C) 0.402
D) 0.0001
E) 0.833
3. At the track, a gambler bets on the wrong horse in a A) This is false reasoning
10-horse field nine times in a row. Later, when talking because there is no "law
to a friend, he said he was confident that he would pick of averages" for indepen-
the winner the next time because he was "due to pick dent events
a winner." Comment on his reasoning
A) This is false reasoning because there is no "law of
averages" for independent events
B) This is false reasoning because he doesn't appear to
be lucky
C) If he doesn't pick the winning horse next time, he
will shortly after that
, Elementary Statistics Final Exam
D) When there are 10 horses in a race & he has chosen
the wrong horse nine times in a row, he statistically
should pick a winner the next time
E) None of the above apply
4. In one city, 47.5% of adults are female, 10.2% of adults D) 0.529
are left-handed, & 4.8% are females. For an adult se-
lected at random from the city, let P (F or L) =
F = event the person is female P(F) + P(L) - P(F&L)
L = event the person is left-handed
Find P(F or L)
A) 0.577
B) 0.679
C) 0.482
D) 0.529
E) 0.6245
5. College students were given three choices of pizza A) 0.631
toppings & asked to choose one favorite. The following
table shows the results P (junior & senior) =
Given that a student's favorite topping is veggie, what junior & senior / total
is the probability that the student is a junior or a se-
nior?
A) 0.631
B) 0.208
C) 0.380
D) 0.41
E) 0.385
6. Determine which scatterplot shows the strongest lin-
ear correlation.
Which shows the strongest linear correlation?
