QMB 3200 Test 1
A binomial experiment is carried out in which 30 dishwashers are randomly decided on from a
production plant and tested to determine whether or not or no longer they function nicely. Any
unique dishwasher will paintings nicely with a chance of p = .98. What is the random variable on
this test?
A. The 30 dishwashers
b. One dishwasher and whether it really works well
c. The probability that the dishwasher works nicely
d. The quantity that works well shape the 30 decided on - ANS-d. The quantity that works
properly form the 30 selected
A continuous random variable may additionally assume
a. Any cost in an c program languageperiod or collection of durations
b. Handiest integer values in an c programming language or series of durations
c. Most effective fractional values in an c language or series of durations
d. Simplest the fine integer values in an interval - ANS-a. Any cost in an c language or series of
intervals
A opportunity near zero suggests ________? - ANS-an occasion is quite not likely to arise
A possibility near 1 suggests ________? - ANS-an event is almost positive to occur
A random variable:
a. May be labeled as being continuous
b. May be classified as being discrete
c. Is a numerical description of the final results of an test
d. All of these picks are correct - ANS-d. All of those alternatives are correct
A table or rule that assigns probabilities to the possible values of a discrete random variable X is
referred to as the:
a. Probability function
b. Anticipated value
c. Conditional possibility
d. 5-number precis - ANS-a. Chance characteristic
An event is:
a. A collection of sample points
b. A group of similarly probably events
c. A collection of sample means
d. A set of pattern points which can be all equal - ANS-a. A collection of sample points
, An experiment consists of four possible consequences with P(E1) =.25, P(E2) =.10, and P(E3)
=.20. The opportunity of outcome E4 is:
a. .50
b. 1
c. .55
d. .45 - ANS-d. .Forty five
An experiment consists of surveying 50 customers at a neighborhood car dealership. The
random variable in this test is the range of mins a customer spends on the dealership. This
random variable is a:
a. Non-stop random variable
b. Discrete random variable
c. Complicated random variable
d. None of these alternatives - ANS-a. Continuous random variable
How do you discover the variety? - ANS-largest value minus smallest value
If a information set has an bizarre range of observations, the median
a. Cannot be determined
b. Is the cost of the center item when all gadgets are organized in ascending order
c. Is the average value of the 2 middle gadgets while all items are arranged in ascending order.
D. Must be same to the mean - ANS-b. Is the cost of the middle object while all gadgets are
organized in ascending order
If a records set has n elements then _______? - ANS-it contains n observations
If a random variable can count on certainly one of five consequences and the distribution is
uniform, what's the probability function for this random variable?
A. F(x) = 1/5x
b. F(x) = 5
c. F(x) = .20
d. F(x) = x^5 - ANS-c. F(x) = .20
If an test has n feasible effects, the classical approach might assign what opportunity? -
ANS-1/n to each outcome
In a survey of clients at a song store the age of the individual become recorded and is shown
below. What is the possibility that a randomly selected consumer is between the age of 15 and
19?
Age / Number of Customers
15-
20-14 / forty two
25-
30+ / 19
a. .25
b. .04
A binomial experiment is carried out in which 30 dishwashers are randomly decided on from a
production plant and tested to determine whether or not or no longer they function nicely. Any
unique dishwasher will paintings nicely with a chance of p = .98. What is the random variable on
this test?
A. The 30 dishwashers
b. One dishwasher and whether it really works well
c. The probability that the dishwasher works nicely
d. The quantity that works well shape the 30 decided on - ANS-d. The quantity that works
properly form the 30 selected
A continuous random variable may additionally assume
a. Any cost in an c program languageperiod or collection of durations
b. Handiest integer values in an c programming language or series of durations
c. Most effective fractional values in an c language or series of durations
d. Simplest the fine integer values in an interval - ANS-a. Any cost in an c language or series of
intervals
A opportunity near zero suggests ________? - ANS-an occasion is quite not likely to arise
A possibility near 1 suggests ________? - ANS-an event is almost positive to occur
A random variable:
a. May be labeled as being continuous
b. May be classified as being discrete
c. Is a numerical description of the final results of an test
d. All of these picks are correct - ANS-d. All of those alternatives are correct
A table or rule that assigns probabilities to the possible values of a discrete random variable X is
referred to as the:
a. Probability function
b. Anticipated value
c. Conditional possibility
d. 5-number precis - ANS-a. Chance characteristic
An event is:
a. A collection of sample points
b. A group of similarly probably events
c. A collection of sample means
d. A set of pattern points which can be all equal - ANS-a. A collection of sample points
, An experiment consists of four possible consequences with P(E1) =.25, P(E2) =.10, and P(E3)
=.20. The opportunity of outcome E4 is:
a. .50
b. 1
c. .55
d. .45 - ANS-d. .Forty five
An experiment consists of surveying 50 customers at a neighborhood car dealership. The
random variable in this test is the range of mins a customer spends on the dealership. This
random variable is a:
a. Non-stop random variable
b. Discrete random variable
c. Complicated random variable
d. None of these alternatives - ANS-a. Continuous random variable
How do you discover the variety? - ANS-largest value minus smallest value
If a information set has an bizarre range of observations, the median
a. Cannot be determined
b. Is the cost of the center item when all gadgets are organized in ascending order
c. Is the average value of the 2 middle gadgets while all items are arranged in ascending order.
D. Must be same to the mean - ANS-b. Is the cost of the middle object while all gadgets are
organized in ascending order
If a records set has n elements then _______? - ANS-it contains n observations
If a random variable can count on certainly one of five consequences and the distribution is
uniform, what's the probability function for this random variable?
A. F(x) = 1/5x
b. F(x) = 5
c. F(x) = .20
d. F(x) = x^5 - ANS-c. F(x) = .20
If an test has n feasible effects, the classical approach might assign what opportunity? -
ANS-1/n to each outcome
In a survey of clients at a song store the age of the individual become recorded and is shown
below. What is the possibility that a randomly selected consumer is between the age of 15 and
19?
Age / Number of Customers
15-
20-14 / forty two
25-
30+ / 19
a. .25
b. .04
