IEE 380 MIDTERM ONE EXAM 2025/2026
QUESTIONS AND ANSWERS 100% PASS
Engineers need to have a working knowledge of statistics because many aspects of engineering
involve working with - ANS ANS: data
When successive observations of a system do not produce the same result, we have
experienced - ANS ANS: Variability
A dot diagram is useful for - ANS * Seeing features of small data sets
* Finding the location or middle of the data
* Comparing two small data sets
* Seeing the variability in the data
An analyst for the engineering dean's office has decided to use existing freshman enrolllment
data from 2001 through 2017 to predict
the freshman engineering enrollment for 2018. This situation may be described as - ANS A
retrospective study
Which of the following uses historical data? - ANS retrospective study
When we collect data by observing a population or process without disturbing it, we are
conducting a(an) - ANS observational study
Tampering with a system or process usually resu Its in an increase in - ANS Variability
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, An experiment that can be repeated many times under identical conditions yet have different
outcomes is called a random experiment. - ANS True
Sample spaces are only discrete. - ANS False
An event is a subset of the sample space of a random experiment. - ANS True
The sample space of a random experiment contains all of the possible outcomes. - ANS True
A random variable is said to be discrete if it has an infinite number of values in
a finite interval of its range. - ANS False
A random variable is a function that assigns a probability to each outcome in
the sample space of a random experiment. - ANS False
The combination rule determines the number of ways a selection of a: items
from a set of n available items can happen if we assume order does not
matter. - ANS True
If Event A and Event B are independent, which of the following is true? - ANS The occurrence
of A does not affect the probability of B occurring.
If "(A I B) = 0.46, P(B) = 0.75, and P(A) = 0.46, are the events B and the complement of A
independent? - ANS Yes
The denominator of Bayes' Theorem uses the - ANS Total probability rule
Bayes' theorem states that P(A I B) = (P(B|A)P(A))/(P(B)) - ANS true
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
QUESTIONS AND ANSWERS 100% PASS
Engineers need to have a working knowledge of statistics because many aspects of engineering
involve working with - ANS ANS: data
When successive observations of a system do not produce the same result, we have
experienced - ANS ANS: Variability
A dot diagram is useful for - ANS * Seeing features of small data sets
* Finding the location or middle of the data
* Comparing two small data sets
* Seeing the variability in the data
An analyst for the engineering dean's office has decided to use existing freshman enrolllment
data from 2001 through 2017 to predict
the freshman engineering enrollment for 2018. This situation may be described as - ANS A
retrospective study
Which of the following uses historical data? - ANS retrospective study
When we collect data by observing a population or process without disturbing it, we are
conducting a(an) - ANS observational study
Tampering with a system or process usually resu Its in an increase in - ANS Variability
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, An experiment that can be repeated many times under identical conditions yet have different
outcomes is called a random experiment. - ANS True
Sample spaces are only discrete. - ANS False
An event is a subset of the sample space of a random experiment. - ANS True
The sample space of a random experiment contains all of the possible outcomes. - ANS True
A random variable is said to be discrete if it has an infinite number of values in
a finite interval of its range. - ANS False
A random variable is a function that assigns a probability to each outcome in
the sample space of a random experiment. - ANS False
The combination rule determines the number of ways a selection of a: items
from a set of n available items can happen if we assume order does not
matter. - ANS True
If Event A and Event B are independent, which of the following is true? - ANS The occurrence
of A does not affect the probability of B occurring.
If "(A I B) = 0.46, P(B) = 0.75, and P(A) = 0.46, are the events B and the complement of A
independent? - ANS Yes
The denominator of Bayes' Theorem uses the - ANS Total probability rule
Bayes' theorem states that P(A I B) = (P(B|A)P(A))/(P(B)) - ANS true
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
