QNT 561 Final Exam 2
1. A difference between calculating sample mean and population mean is
A. Only in symbols, we use instead of µ and n instead of N
B. We divide sum of observations by n - 1 instead of n
C. observations are ranked and select middle value for population mean
D. There are...
QNT 561 Final Exam 2
1. A difference between calculating sample mean and population mean is
A. Only in symbols, we use instead of µ and n instead of N
B. We divide sum of observations by n - 1 instead of n
C. observations are ranked and select middle value for population mean
D. There are no differences
2. Which of following measures of central location is affected most by extreme values?
A. Median
B. Mean
C. Mode
D. Geometric mean
3. Which level of measurement is required for median?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
4. In which of following distributions is probability of a success usually small?
A. Binomial
B. Poisson
C. Hyper geometric
D. All distribution
5. Which of following is not a requirement of a probability distribution?
A. Equally likely probability of a success
B. Sum of possible outcomes is 1.00
C. outcomes are mutually exclusive
D. probability of each outcome is between 0 and 1
6. Which of following is not a requirement of a binomial distribution?
A. A constant probability of success
B. Only two possible outcomes
C. A fixed number of trails
D. Equally likely outcomes
7. A sample
A. Is a part of population
B. Has more than 30 observations
C. Is usually identified as N
D. All of above
8. difference between sample mean and population mean is called
A. Population mean.
B. Population standard deviation
, C. Standard error of mean
D. Sampling error
9. Suppose a population consisted of 20 items. How many different sample of n = 3 are possible?
A. 6840
B. 1140
C. 20
D. 120
10. A point estimate is
A. Always an estimate of population mean
B. Always equal to population value
C. An estimate of population parameter
D. None of above
11. We wish to develop a confidence interval for population mean. population follows normal
distribution, standard deviation of population is 3, and we have a sample of 10 observations. We
decide to use 90 percent level of confidence. appropriate value of to represent level of confidence
is
A. z =1.65
B. z = 1.96
C. t = 1.833
D. t = 1.812
12. A confidence interval
A. Always includes population parameter
B. Decreases in width as sample size is increased
C. Cannot include a value of 0
D. None of above
13. Special Rule of Addition is used to combine
A. Independent events
B. Mutually exclusive events
C. Events that total more than one
D. Events based on subjective probabilities
14. We use General Rule of Multiplication to combine
A. Events that are not independent
B. Mutually exclusive events
C. Events that total more than 1.00
D. Events based on subjective probabilities
15. An experiment is a
A. Collection of events
B. Collection of outcomes
C. Always greater than 1
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 SUPERGRADES01. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.39. You're not tied to anything after your purchase.
