OPRE 3360 FINAL REVIEW PAPER 2026
COMPLETE QUESTIONS AND SOLUTIONS
GRADED A+
◉population standard deviation. Answer: rarely know exactly, but
often a good estimate can be obtained based on historical data or
other information
◉(1- sigma). Answer: the confidence coefficient (confidence level)
◉t-distribution. Answer: a family of similar probability distributions
more degrees of freedom has less dispersion
◉t-distribution - depends on. Answer: depends on a parameter
known as
"the degree of freedom"
◉margin error < Error. Answer: round up
◉Margin error > Error. Answer: round down
, ◉"or more"
"or Less". Answer: round down
round up
◉The sampling distribution of p-bar. Answer: can be approximated
by a normal distribution whenever
np > 5 and n( 1 - p ) > 5
◉when p bar unknown to us
The planning value p*. Answer: 1. using the sample proportion from
a previous sample of same or similar units
2. Selecting a preliminary sample and using the sample proportion
form this sample
3. use 0.50 as the p* value
◉Hypothesis testing. Answer: 1. It can be used to determine
whether a statement about the value of a population parameter
should or should not be rejected.
◉Hypothesis testing procedure. Answer: uses data from a sample to
test the two competing statement indicated by Ho and Ha, which are
mutually exclusive and exhaustive
COMPLETE QUESTIONS AND SOLUTIONS
GRADED A+
◉population standard deviation. Answer: rarely know exactly, but
often a good estimate can be obtained based on historical data or
other information
◉(1- sigma). Answer: the confidence coefficient (confidence level)
◉t-distribution. Answer: a family of similar probability distributions
more degrees of freedom has less dispersion
◉t-distribution - depends on. Answer: depends on a parameter
known as
"the degree of freedom"
◉margin error < Error. Answer: round up
◉Margin error > Error. Answer: round down
, ◉"or more"
"or Less". Answer: round down
round up
◉The sampling distribution of p-bar. Answer: can be approximated
by a normal distribution whenever
np > 5 and n( 1 - p ) > 5
◉when p bar unknown to us
The planning value p*. Answer: 1. using the sample proportion from
a previous sample of same or similar units
2. Selecting a preliminary sample and using the sample proportion
form this sample
3. use 0.50 as the p* value
◉Hypothesis testing. Answer: 1. It can be used to determine
whether a statement about the value of a population parameter
should or should not be rejected.
◉Hypothesis testing procedure. Answer: uses data from a sample to
test the two competing statement indicated by Ho and Ha, which are
mutually exclusive and exhaustive
