BANA 1 – Exam 2 2025/2026 Exam
Questions and Answers | 100% Pass
If two events are independent, then - 🧠 ANSWER ✔✔the product of their
probabilities gives their intersection.
Two events with nonzero probabilities - 🧠 ANSWER ✔✔cannot be both
mutually exclusive and independent
If A and B are mutually exclusive events with P(A) = 0.295, P(B) = 0.32,
then P(A | B) = - 🧠 ANSWER ✔✔0.0000
If A and B are independent events with P(A) = 0.2 and P(B) = 0.6, then P(A
union B) = - 🧠 ANSWER ✔✔0.68
Bayes' theorem is used to compute - 🧠 ANSWER ✔✔the posterior
probabilities
The company identified in Chapter 5, Statistics in Practice is - 🧠 ANSWER
✔✔not a company but precinct polling locations
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,The Statistics in Practice example in Chapter 5 focuses on - 🧠 ANSWER
✔✔polling booths or machines
Chapter 5 focuses on - 🧠 ANSWER ✔✔probability distributions
A random variable that can assume only a finite number of values is
referred to as a(n) - 🧠 ANSWER ✔✔discrete random variable
Forty percent of the students who enroll in a statistics course go to the
statistics laboratory on a regular basis. Past data indicates that 65% of
those students who use the lab on a regular basis make a grade of A in the
course. On the other hand, only 10% of students who do not go to the lab
on a regular basis make a grade of A. If a particular student made an A,
determine the probability that she or he used the lab on a regular basis.
Enter your answer rounded to four decimal places. Use a tree diagram to
answer this question. - 🧠 ANSWER ✔✔0.8125
A numerical description of the outcome of an experiment is called a - 🧠
ANSWER ✔✔random variable
The number of customers that enter a store during one day is an example
of - 🧠 ANSWER ✔✔a discrete random variable
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, An experiment consists of determining the speed of automobiles on a
highway by the use of radar equipment. The random variable in this
experiment is a - 🧠 ANSWER ✔✔continuous random variable
The weight of an object is an example of - 🧠 ANSWER ✔✔a continuous
random variable
A measure of the average value of a random variable is called a(n) - 🧠
ANSWER ✔✔expected value
Random variable x has the probability function f(x) = X/6, for x = 1, 2 or 3
The expected value of x is - 🧠 ANSWER ✔✔2.333
The student body of a large university consists of 60% female students. A
random sample of 8 students is selected.What is the expected number of
females selected? Round your answer to one decimal place. - 🧠 ANSWER
✔✔4.8
The student body of a large university consists of 60% female students. A
random sample of 8 students is selected.What is the probability that among
the students in the sample exactly four are female? Use an Excel function
and round your answer to three decimal places. - 🧠 ANSWER ✔✔0.232
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619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 3
Questions and Answers | 100% Pass
If two events are independent, then - 🧠 ANSWER ✔✔the product of their
probabilities gives their intersection.
Two events with nonzero probabilities - 🧠 ANSWER ✔✔cannot be both
mutually exclusive and independent
If A and B are mutually exclusive events with P(A) = 0.295, P(B) = 0.32,
then P(A | B) = - 🧠 ANSWER ✔✔0.0000
If A and B are independent events with P(A) = 0.2 and P(B) = 0.6, then P(A
union B) = - 🧠 ANSWER ✔✔0.68
Bayes' theorem is used to compute - 🧠 ANSWER ✔✔the posterior
probabilities
The company identified in Chapter 5, Statistics in Practice is - 🧠 ANSWER
✔✔not a company but precinct polling locations
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 1
,The Statistics in Practice example in Chapter 5 focuses on - 🧠 ANSWER
✔✔polling booths or machines
Chapter 5 focuses on - 🧠 ANSWER ✔✔probability distributions
A random variable that can assume only a finite number of values is
referred to as a(n) - 🧠 ANSWER ✔✔discrete random variable
Forty percent of the students who enroll in a statistics course go to the
statistics laboratory on a regular basis. Past data indicates that 65% of
those students who use the lab on a regular basis make a grade of A in the
course. On the other hand, only 10% of students who do not go to the lab
on a regular basis make a grade of A. If a particular student made an A,
determine the probability that she or he used the lab on a regular basis.
Enter your answer rounded to four decimal places. Use a tree diagram to
answer this question. - 🧠 ANSWER ✔✔0.8125
A numerical description of the outcome of an experiment is called a - 🧠
ANSWER ✔✔random variable
The number of customers that enter a store during one day is an example
of - 🧠 ANSWER ✔✔a discrete random variable
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 2
, An experiment consists of determining the speed of automobiles on a
highway by the use of radar equipment. The random variable in this
experiment is a - 🧠 ANSWER ✔✔continuous random variable
The weight of an object is an example of - 🧠 ANSWER ✔✔a continuous
random variable
A measure of the average value of a random variable is called a(n) - 🧠
ANSWER ✔✔expected value
Random variable x has the probability function f(x) = X/6, for x = 1, 2 or 3
The expected value of x is - 🧠 ANSWER ✔✔2.333
The student body of a large university consists of 60% female students. A
random sample of 8 students is selected.What is the expected number of
females selected? Round your answer to one decimal place. - 🧠 ANSWER
✔✔4.8
The student body of a large university consists of 60% female students. A
random sample of 8 students is selected.What is the probability that among
the students in the sample exactly four are female? Use an Excel function
and round your answer to three decimal places. - 🧠 ANSWER ✔✔0.232
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED 3
