BUAL 2600 UPDATED EXAMS TEST PAPER
QUESTIONS AND ANSWERS SURE A+
✔✔complement, union, intersection, addition, conditional probability, and multiplication -
✔✔6 elementary probability rules
✔✔the set of all sample space outcomes not in A; complement = 1 - P(A) - ✔✔the
complement of an event A is...
✔✔elementary events that belong to either A or B or both - ✔✔the union of A and B
are...
✔✔elementary events that belong to both A and B - ✔✔the intersection of A and B are...
✔✔they have no sample space outcomes in common; intersection = 0 - ✔✔A and B are
mutually exclusive if...
✔✔union = P(A) + P(B) - ✔✔if A and B are mutually exclusive then the probability that A
and B (the union of A and B) will occur is...
✔✔union = P(A) + P(B) - intersection (intersection is the joint probability of A and B both
occurring together) - ✔✔if A and B are not mutually exclusive...
, ✔✔conditional probability - ✔✔the probability of an event A, given that B has occurred,
is called (denoted as P(A|B))
✔✔discrete random variable - ✔✔what type of variable has possible values that can be
counted?
✔✔continuous random variable - ✔✔what type of variable may assume any numerical
value in one or more intervals, takes an infinite number of possible values, and are
mostly decimals? (usually measurement)
✔✔greater than or equal to 0 - ✔✔for any value x of the random variable, p(x)
✔✔variance - ✔✔the average of the squared deviations of the different values of the
random variable from the expected value
✔✔standard deviation - ✔✔the square root of the variance is the...
✔✔the spread of the values of the random variable from their expected value - ✔✔the
variance and standard deviation measure...
✔✔binomial distribution - ✔✔the probability of a success or failure outcome in an
experimental survey that is repeated multiple times
✔✔1. experiment consists of n identical traits; 2. each trial results in either "success" or
"failure"; 3. probability of success, p, is constant from trial to trial (probability of failure, q,
is 1-p); 4. trials are independent - ✔✔4 binomial experiment characteristics
✔✔binomial random variable - ✔✔if x is the total number of successes in n trials of a
binomial experiment, then x is a...
✔✔forecasts - ✔✔poisson distributions are used by businessmen to make ________
about the number of customers or sales on certain days or seasons of the years
✔✔curve f(x) - ✔✔the continuous probability distribution of the continuous random
variable x if the probability that x will be in a specific interval of numbers is the...
✔✔probability curve and probability density function - ✔✔other names for a continuous
probability distribution are...
✔✔probability - ✔✔an area under a continuous probability distribution is a...
✔✔1. there are an infinite number of normal curves (the shape of any individual normal
curve depends on its specific mean and standard deviation);2. the highest point is over
QUESTIONS AND ANSWERS SURE A+
✔✔complement, union, intersection, addition, conditional probability, and multiplication -
✔✔6 elementary probability rules
✔✔the set of all sample space outcomes not in A; complement = 1 - P(A) - ✔✔the
complement of an event A is...
✔✔elementary events that belong to either A or B or both - ✔✔the union of A and B
are...
✔✔elementary events that belong to both A and B - ✔✔the intersection of A and B are...
✔✔they have no sample space outcomes in common; intersection = 0 - ✔✔A and B are
mutually exclusive if...
✔✔union = P(A) + P(B) - ✔✔if A and B are mutually exclusive then the probability that A
and B (the union of A and B) will occur is...
✔✔union = P(A) + P(B) - intersection (intersection is the joint probability of A and B both
occurring together) - ✔✔if A and B are not mutually exclusive...
, ✔✔conditional probability - ✔✔the probability of an event A, given that B has occurred,
is called (denoted as P(A|B))
✔✔discrete random variable - ✔✔what type of variable has possible values that can be
counted?
✔✔continuous random variable - ✔✔what type of variable may assume any numerical
value in one or more intervals, takes an infinite number of possible values, and are
mostly decimals? (usually measurement)
✔✔greater than or equal to 0 - ✔✔for any value x of the random variable, p(x)
✔✔variance - ✔✔the average of the squared deviations of the different values of the
random variable from the expected value
✔✔standard deviation - ✔✔the square root of the variance is the...
✔✔the spread of the values of the random variable from their expected value - ✔✔the
variance and standard deviation measure...
✔✔binomial distribution - ✔✔the probability of a success or failure outcome in an
experimental survey that is repeated multiple times
✔✔1. experiment consists of n identical traits; 2. each trial results in either "success" or
"failure"; 3. probability of success, p, is constant from trial to trial (probability of failure, q,
is 1-p); 4. trials are independent - ✔✔4 binomial experiment characteristics
✔✔binomial random variable - ✔✔if x is the total number of successes in n trials of a
binomial experiment, then x is a...
✔✔forecasts - ✔✔poisson distributions are used by businessmen to make ________
about the number of customers or sales on certain days or seasons of the years
✔✔curve f(x) - ✔✔the continuous probability distribution of the continuous random
variable x if the probability that x will be in a specific interval of numbers is the...
✔✔probability curve and probability density function - ✔✔other names for a continuous
probability distribution are...
✔✔probability - ✔✔an area under a continuous probability distribution is a...
✔✔1. there are an infinite number of normal curves (the shape of any individual normal
curve depends on its specific mean and standard deviation);2. the highest point is over
