QMB 3200 MIDTERM UCF EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ FOR GUARANTEED PASS LATEST
UPDATE 2025.
In interval estimation, as the sample size becomes larger, the interval estimate -
CORRECT ANSWER becomes narrower.In general, higher confidence levels
provide larger confidence intervals.
One way to have high confidence and a small margin of error is to -
CORRECT ANSWER increase the sample size.
From a population that is normally distributed, a sample of 30 elements is selected
and the standard deviation of the sample is computed. For the interval estimation
of μ, the proper distribution to use is the - CORRECT ANSWER t distribution
with 29 degrees of freedom.
As the number of degrees of freedom for a t distribution increases, the difference
between the t distribution and the standard normal distribution - CORRECT
ANSWER becomes smaller.
The value added and subtracted from a point estimate in order to develop an
interval estimate of the population parameter is known as the - CORRECT
ANSWER margin of error.
What is the symbol for the population mean? If the population follows a normal
distribution, the confidence interval is and can be used for any
sample size. If the population does not follow a normal distribution, the
confidence interval will be . Which of the following
choices correctly complete this statement? - CORRECT ANSWER exact;
approximate.
When computing the sample size needed to estimate a proportion within a given
margin of error for a specific confidence level, what planning value of p should be
used when no estimate of p is available? - CORRECT ANSWER 0.50
A statistics teacher started class one day by drawing the names of 10 students out
of a hat and asked them to do as many pushups as they could. The 10 randomly
selected students averaged 15 pushups per person with a standard deviation of 9
pushups. Suppose the distribution of the population of number of pushups that can
be done is approximately normal. Which of the following statements is true? -
CORRECT ANSWER A t distribution should be used because σ is unknown.
The z value for a 99% confidence interval estimation is - CORRECT ANSWER 2.58
,QMB 3200 MIDTERM UCF EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ FOR GUARANTEED PASS LATEST
UPDATE 2025.
In an interval estimation for a proportion of a population, the critical value of z at
99% confidence is - CORRECT ANSWER 2.576.
,QMB 3200 MIDTERM UCF EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ FOR GUARANTEED PASS LATEST
UPDATE 2025.
The t value for a 99% confidence interval estimation based upon a sample of size
10 is - CORRECT ANSWER 3.250.
To compute the necessary sample size for an interval estimate of a population
proportion, all of the following procedures are recommended when p is unknown
except - CORRECT ANSWER using .95 as an estimate.
Using an α = .04, a confidence interval for a population proportion is determined to
be .65 to .75. If the level of significance is decreased, the interval for the
population proportion - CORRECT ANSWER becomes wider.
For a fixed confidence level and population standard deviation, if we would like to
cut our margin of error to 1/3 of the original size, we should take a sample size that
is - CORRECT ANSWER nine times as large as the original sample size.
The sampling distribution of can be approximated by a normal distribution as long
as - CORRECT ANSWER np> 5 and n(1-p)>5 greater or equals.
When "s" is used to estimate "σ," the margin of error is computed by using the -
CORRECT ANSWER t distribution.
The margin of error in an interval estimate of the population mean is a function of
all of the following except the - CORRECT ANSWER sample mean.
For a fixed sample size, n, in order to have a higher degree of confidence, the
margin of error and the width of the interval - CORRECT ANSWER must be
larger.
The probability that the interval estimation procedure will generate an interval that
does not contain µ is known as the - CORRECT ANSWER level of significance.
As the sample size increases, the margin of error - CORRECT ANSWER decreases.
When the level of confidence decreases, the margin of error - CORRECT
ANSWER becomes smaller.
An approximate value of a population parameter that provides limits and believed
to contain the value of the parameter is known as - CORRECT ANSWER the
interval estimate.
To compute the necessary sample size for an interval estimate of a population
mean, all of the following procedures are recommended when σ is unknown except
, QMB 3200 MIDTERM UCF EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ FOR GUARANTEED PASS LATEST
UPDATE 2025.
- CORRECT ANSWER using σ = 1.
For the interval estimation of μ when σ is known and the sample is large, the
proper distribution to use is - CORRECT ANSWER the normal distribution.
What is the symbol for the sample mean? - CORRECT ANSWER X bar
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ FOR GUARANTEED PASS LATEST
UPDATE 2025.
In interval estimation, as the sample size becomes larger, the interval estimate -
CORRECT ANSWER becomes narrower.In general, higher confidence levels
provide larger confidence intervals.
One way to have high confidence and a small margin of error is to -
CORRECT ANSWER increase the sample size.
From a population that is normally distributed, a sample of 30 elements is selected
and the standard deviation of the sample is computed. For the interval estimation
of μ, the proper distribution to use is the - CORRECT ANSWER t distribution
with 29 degrees of freedom.
As the number of degrees of freedom for a t distribution increases, the difference
between the t distribution and the standard normal distribution - CORRECT
ANSWER becomes smaller.
The value added and subtracted from a point estimate in order to develop an
interval estimate of the population parameter is known as the - CORRECT
ANSWER margin of error.
What is the symbol for the population mean? If the population follows a normal
distribution, the confidence interval is and can be used for any
sample size. If the population does not follow a normal distribution, the
confidence interval will be . Which of the following
choices correctly complete this statement? - CORRECT ANSWER exact;
approximate.
When computing the sample size needed to estimate a proportion within a given
margin of error for a specific confidence level, what planning value of p should be
used when no estimate of p is available? - CORRECT ANSWER 0.50
A statistics teacher started class one day by drawing the names of 10 students out
of a hat and asked them to do as many pushups as they could. The 10 randomly
selected students averaged 15 pushups per person with a standard deviation of 9
pushups. Suppose the distribution of the population of number of pushups that can
be done is approximately normal. Which of the following statements is true? -
CORRECT ANSWER A t distribution should be used because σ is unknown.
The z value for a 99% confidence interval estimation is - CORRECT ANSWER 2.58
,QMB 3200 MIDTERM UCF EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ FOR GUARANTEED PASS LATEST
UPDATE 2025.
In an interval estimation for a proportion of a population, the critical value of z at
99% confidence is - CORRECT ANSWER 2.576.
,QMB 3200 MIDTERM UCF EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ FOR GUARANTEED PASS LATEST
UPDATE 2025.
The t value for a 99% confidence interval estimation based upon a sample of size
10 is - CORRECT ANSWER 3.250.
To compute the necessary sample size for an interval estimate of a population
proportion, all of the following procedures are recommended when p is unknown
except - CORRECT ANSWER using .95 as an estimate.
Using an α = .04, a confidence interval for a population proportion is determined to
be .65 to .75. If the level of significance is decreased, the interval for the
population proportion - CORRECT ANSWER becomes wider.
For a fixed confidence level and population standard deviation, if we would like to
cut our margin of error to 1/3 of the original size, we should take a sample size that
is - CORRECT ANSWER nine times as large as the original sample size.
The sampling distribution of can be approximated by a normal distribution as long
as - CORRECT ANSWER np> 5 and n(1-p)>5 greater or equals.
When "s" is used to estimate "σ," the margin of error is computed by using the -
CORRECT ANSWER t distribution.
The margin of error in an interval estimate of the population mean is a function of
all of the following except the - CORRECT ANSWER sample mean.
For a fixed sample size, n, in order to have a higher degree of confidence, the
margin of error and the width of the interval - CORRECT ANSWER must be
larger.
The probability that the interval estimation procedure will generate an interval that
does not contain µ is known as the - CORRECT ANSWER level of significance.
As the sample size increases, the margin of error - CORRECT ANSWER decreases.
When the level of confidence decreases, the margin of error - CORRECT
ANSWER becomes smaller.
An approximate value of a population parameter that provides limits and believed
to contain the value of the parameter is known as - CORRECT ANSWER the
interval estimate.
To compute the necessary sample size for an interval estimate of a population
mean, all of the following procedures are recommended when σ is unknown except
, QMB 3200 MIDTERM UCF EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ FOR GUARANTEED PASS LATEST
UPDATE 2025.
- CORRECT ANSWER using σ = 1.
For the interval estimation of μ when σ is known and the sample is large, the
proper distribution to use is - CORRECT ANSWER the normal distribution.
What is the symbol for the sample mean? - CORRECT ANSWER X bar
