Week 3 Quiz
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Apr 3, 2024
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n 1
(Mandatory)
6 / Select all VALID probabilities values.
Question options:
0%
49/50
50/49
1.01
1
-0.25
110%
on datory)
Is a good hitter in baseball who has struck out the last six times due for a hit his next time up?
Question options:
The Law of Large Numbers predicts the hitter is due for a hit.
This is an example of the Law of Averages. Yes, the hitter is now due for a hit.
This is an example of the so-called Law of Averages. No, the hitter is not due for a hit because the Law of Averages is non-existent and doesn't predict anything.
The Law of Large Numbers predicts the hitter is not due for a hit.
on datory)
How many sequences of 5 things can be formed from 7 different things
with replacement
and order is important? Note
that a permutation or combination problem is sampling without replacement.
Answer:
16,807
Hide question 3 feedback
When drawing with replacement and order is important, Y
X
sequences of X things can be formed
from Y different things.
n 4
(Mandatory)
6 / How many permutations can be formed by sampling 4 things from 6 different things?
Answer:
360
Hide question 4 feedback
When drawing without replacement and order is important, =PERMUT(Y, X) permutations can be formed by sampling X things from Y different things
n 5
(Mandatory)
6 / How many combinations of 5 people can be formed from 6 people?
Answer:
6
Hide question 5 feedback
=COMBIN (Y, X) committees of X people can be formed from Y people. This is sampling without replacement and order does not matter.
n 6
(Mandatory)
10 / 1
A local zoo has only mammals and reptiles. So, the sample space for this zoo has mammals and reptiles.
Choose the statements when one animal is selected randomly.
Question options:
P(Mammal and Reptile) = 0, or impossible
P(Mammal and Reptile) > 0, or possible
P(Mammal or Reptile) = 1, or certain
P(Mammal and Reptile) < 0
P(Mammal or Reptile) = 0, or impossible
on datory)
Toss 2 dice, and let the event be the sum of the values of the top faces. The possible outcomes are listed inside the
following table at the intersection of the row of the "toss of 1st
die" and the column of "toss of 2nd die":
Because there are 36 outcomes, the probability of a sum = frequency of the sum/36. The probabilities of the sums are:
Sum Probability
2
1/36
3
2/36
4
3/36
5
4/36
6
5/36
7
6/36
8
5/36
9
4/36
10
3/36
11
2/36
12
1/36
Only one of the sums 2 through 12 can occur in a single toss of the dice. These are mutually exclusive events. The Simple Addition Rule P(A or B) = P(A) + P(B applies).
Match the items on the left to the items on the right.
__3
__ 0.000
__2
__ 0.889
__1
__ 0.583
1
.
P(X at least 7)
2
.
P(X is not 9)
3
.
P(X = 1)
Hide question 7 feedback
P(X at least 7) = P(7) + P(8) + P(9) + P(10) + P(11) + P(12). The possible sums are mutually exclusive. The Sim
P(X is not 9) = 1 - P(9). The Complement Rule applies.
P(X = 1) = 0 because 1 is not a possible sum.
n 8
(Mandatory)
6 / What is the probability of choosing a red card or a King from a deck of 52 cards?
Question options:
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KeypadAnswer
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Probability
Possible Rate of Return
0.25
-0.10
0.15
0.00
0.35
0.10
0.25
0.25
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