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StatStudy Guide Exam 3 questions with correct answers.
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StatStudy Guide Exam 3 questions with correct answers.
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StatStudy Guide Exam 3 questions with correctanswers
What is the difference between an outcome and an event? Correct
Answer-An outcome is the result of a single probability experiment. An
event is a set of one or more possible outcomes.
Determine which numbers could not be used to represent the probability
of an event. Correct Answer--1.5, because probability values cannot be
less than 0.
and
64/25, because probability values cannot be greater than 1.
Choose the three formulas that can be used to describe complementary
events.
Select the three formulas that can be used to describe complementary
events. Correct Answer-P(E)+P(E')=1
P(E)=1-P(E')
P(E')=1-P(E)
Determine whether the statement is true or false.
,You toss a coin and roll a die. The event "tossing tails and rolling a 4 or
6" is a simple event. Correct Answer-False, the event is not simple
because it consists of two possible outcomes.
Determine whether the statement is true or false. If it is false, rewrite it
as a true statement.
You toss a fair coin nine times and it lands tails up each time. The
probability it will land heads up on the tenth flip is greater than 0.5.
Correct Answer-The statement is false. The correct statement is "You
toss a fair coin nine times and it lands tails up each time. The probability
it will land heads up on the tenth flip is exactly 0.5."
Determine whether the statement is true or false.
When an event is almost certain to happen, its complement will be an
unusual event. Correct Answer-True, the complement would be an
unusual event.
A random number generator is used to select a number from 1 to 200
(inclusively). What is the probability of selecting the number 238?
Correct Answer-0
Sixteen of the 100 digital video recorders (DVRs) in an inventory are
known to be defective. What is the probability you randomly select a
DVR that is not defective? Correct Answer-P(E)= #outcomes in event
E/Total numer of outcomes in sample
= .84
, The probability that an event will happen is Upper P left parenthesis
Upper E right parenthesisequalsStartFraction 28 Over 31 EndFraction
. Find the probability that the event will not happen. Correct Answer-
3/31
The probability that an event will not happen is Upper P left parenthesis
Upper E prime right parenthesisequals0.84. Find the probability that the
event will happen. Correct Answer-.16
Identify the sample space of the probability experiment and determine
the number of outcomes in the sample space.
Randomly choosing a multiple of 4 between 20 and 40 comma inclusive
Correct Answer-20,24,28,32,36,40
there are 6 outcomes
Identify the sample space of the probability experiment and determine
the number of outcomes in the sample space. Draw a tree diagram.
Determining an athlete's sport (baseball left parenthesis Upper B right
parenthesis comma soccer left parenthesis Upper S right parenthesis
comma football left parenthesis Upper F right parenthesis) and skill (low
left parenthesis Upper L right parenthesis comma medium left
parenthesis Upper M right parenthesis comma high left parenthesis
Upper H right parenthesis) Correct Answer-{BL comma BM comma BH
comma SL comma SM comma SH comma FL comma FM comma FH}
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