QMB 3200 FINAL EXAM QUESTIONS
WITH CORRECT VERIFIED ANSWERS
LATEST UPDATE (2024/2025)
GUARANTEED PASS
A sample of 99 distances has a mean of 24 feet and a median of 21.5 feet.
Unfortunately, it has just been discovered that an observation that was
erroneously recorded as "30" actually had a value of "35." If we make this
correction to the data, then: - ANS ✓the median remains the same, but the
mean is increased.
A numerical value used as a summary measure for a sample, such as sample
mean, is known as a: - ANS ✓sample statistic.
The measure of location that is most likely to be influenced by extreme
values in a data set is the: - ANS ✓mean
A student was performing an experiment that compared a new high protein
food to the old food for pigs. He found the mean weight gain for subjects
consuming the new food to be 12.8 pounds with a standard deviation of 3.5
pounds. Later, he realized that the scale was out of calibration by 1.5
pounds (meaning that the scale weighed items 1.5 pounds more). What
should be the summary measures, mean and standard deviation, for the
subjects consuming the new food? - ANS ✓The mean should be 11.3 and the
standard deviation should remain unchanged.
When a set of data has suspect outliers, which of the following is the
referred measure of central tendency? - ANS ✓median
QMB 3200
, 2
QMB
In a sample of 500 students whose mean height is 67.8 inches, 150 were
women. If the mean height of the women was 63.0 inches, what is the mean
height of the men in the sample? - ANS ✓69.9
The coefficient of variation formula - ANS ✓the standard deviation divided by
the mean and multiplied by 100.
The summary statistics for the hourly wages of a sample of 130 system
analysts are given below:
Mean = 60
Range = 20
Mode = 73
Variance = 324
Median = 74
The coefficient of variation is equal to: - ANS ✓(square root 324/ 60 x100)=
30%
If the variance of a data set is correctly computed with the formula using in
the denominator, which of the following is true?
a. The data set is a population.
b. The data set is adjusted for skewness.
c. The data set is too small.
d. The data set is a sample. - ANS ✓d. The data set is a sample.
In a sample of size five, the mean is 23 and four of the observations have the
following deviations from the mean: -6, 2, 5, and 3. What is the value of the
fifth observation? - ANS ✓-4
QMB 3200
, 3
QMB
There are three executives in an office with age 56, 57, and 58. If a 57-year-
old executive enters the room, then: - ANS ✓the mean age will stay the same,
but the variance will decrease.
The difference between the largest and the smallest data values is the: -
ANS ✓range
The interquartile range is: - ANS ✓the difference between Q3 and Q1, the third
and first quartiles.
The standard deviation of a sample was reported to be 20. The report
indicated that Σ (xi-x̄ )^2 = 7200. What is the sample size? - ANS ✓20-1 = 19
The numerical value of the standard deviation can never be: - ANS
✓negative
The interquartile range is used as a measure of variability to overcome the
fact that the: - ANS ✓range is comprised of extreme values.
Given the following information:
Standard deviation = 8
Coefficient of variation = 64%
The mean is - ANS ✓%= 12.5
The sum of deviations of the individual data elements from their mean is: -
ANS ✓always equal to zero
The correlation coefficient ranges between: - ANS ✓-1 and 1
QMB 3200
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller DoctorKen. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
