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5.1 Probability: Could that have happened by chance alone? Flashcards | StudBud
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5.1 Probability: Could that have happened by chance alone?
5.1 Probability: Could that have happened by chance alone?
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Questions
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Answers
1
If an event is
certain to occur
, it has a probability of
0.5
0.90
1
0
2
You simulate choosing a teen at random & recording data. Which is a correct assignment?
One digit = one teen; 0 to 3 = works; 4 to 9= does not
One digit = one teen; 0 to 4 = works; 5 to 9 = does not
Two digits=one teen; 16 to 19 = works; all others = does not
Two digits = one teen; 00 to 39= works; 40 to 99 = not work
3
You are playing a dice game and you just rolled 5 consecutive FOURS! Which statement is true?
Each time you roll, the probability of another 1 is less.
Each time you roll, the probability of another 1 is greater.
The probability of rolling a 4 again is 1/6.
You should find another die, 5 consecutive 5's is impossible
4
The probability of any outcome of a random phenomenon is ...
the proportion of times any event occurs once.
the proportion of times the outcome occurs over many repeats
any number that is greater than 0 and less than 1.
a precise meaurment of the law of averages.
5
An event with a probability of 0.05 ...
is very likely to occur.
is certain to occur.
cannot occur.
is very unlikely to occur.
6
If I toss a fair coin twice and get TT, what is the probability that tails appears next toss?
2/3
1
1/2
0
7
What is the theoretical probability that you draw a
red
card from a shuffled deck of cards?
1/4
1/2
0
1/13
8
Choose the correct answer.
a
d
c
b
9
A number between 0 and 1 is
an improper fraction
the square root of 2.
the probability that a random event will occur.
the number of of successful statistics students.
10
Two digits simulates one individual. Which random digit design would be best?
00 to 03=no opinion; 04 to 37= opposes; and 38 to 60 =favors
01 to 60=favors; 61 to 97=opposess; and 98 to 00= no opinion
00 to 60=favors; 61 to 97 =opposes; and 98 to 99= no opinion
00 to 60= favors; 0 to 37 = opposes; and 0 to 3 = no opinion
11
In a random number table, which 4-digit number is more likely to occur: 2873 or 9999?
9999 it occurs more often
neither, they are equally unlikely
both are very likely
2837, because it's more random.
12
The sum of the probabilities for all possible outcomes is
unknown.
1.
infinite.
0.
13
The Law of Large Numbers says with repetition
experimental probability approaches theoretical probability.
chance events even out in the long run.
probability will grow without bound.
outcomes from repeated chance events multiply.
14
In a probability and statistics, a random phenomenon is something that
has a limited set of completely unpredictable outcomes.
is unpredictable, yet more observations result in a pattern
is predictable from time to time.
is completely unexpected or surprising.
15
Which of these is a correct assignment of digits for this simulation? 1 digit simulates 1 teen;
odd = teen who works 5 plus hours; even = works less
5 to 9 = teen who works 5 plus hours; 0 to 4 = work less
0 = teen who works 5 plus hours; all others= works less
0 and 1 = teen who works 5 plus hours; 2 to 9 = works less
16
What is the probability that you draw a
diamond
from a well-shuffled deck of cards?
0
1/2
1/4
1/13
17
THREE of the following are MYTHS about randomness. Which ONE is
NOT
a myth about randomness?
Law of averages
Random events display short-term regularity.
Short-term streaks get drowned out in the long-run.
Random events balance out because they're "due."
18
Probability is
the long-run relative frequency of a chance outcome
the outcome of a chance event
the chance of winning in the short run
the odds of success
19
If an event is
impossible
, it has a probability of
.99
0.05
1
0
