F-MBA SQA Final Exam
Problem 1 2 3 4 5 Total Points 10 10 10 20 10 60 Score

Exam Rules A. B. C. D. The exam is open-book and open-note. You can use only a calculator during the exam; but you cannot use a laptop. You are NOT allowed to discuss any issues with students in the class during the exam. Any kind of cheating during the exam will result in zero score with possibly further penalties by Korea University Business School.

I acknowledge and accept the above exam rules.

Signature Name(printed) KU ID#

Date:

FMBA SQA Final Exam

Prof. Kihoon Kim Oct. 10, 2012

1. Multiple and True/False Questions (10 points) Please circle the right answer for the questions below. Each question is assigned 2.5 points. 1. The sample mean of population 1 is smaller than that of population 2. If we are interested in testing whether the mean of population 1 is significantly smaller than the mean of population 2, the a. null hypothesis should state µ1 − µ2 < 0 b. null hypothesis should state µ1 − µ2 ≤ 0 c. alternative hypothesis should state µ1 − µ2 < 0 d. alternative hypothesis should state µ1 − µ2 > 0 ANSWER: c

2.

A Type I error is committed when a. a true alternative hypothesis is not accepted b. a true null hypothesis is rejected c. the critical value is greater than the value of the test statistic d. sample data contradict the null hypothesis ANSWER: b In determining an interval estimate of a population mean when σ is unknown, we use a t distribution with a. n − 1 degrees of freedom

3.

b. c. d. ANSWER: 4.

n degrees of freedom
n − 1 degrees of freedom n degrees of freedom c

The purpose of statistical inference is to provide information about the a. sample based upon information contained in the population b. population based upon information contained in the sample c. population based upon information contained in the population d. mean of the sample based upon the mean of the...

...mean.
SAMPLING DISTRIBUTION : The probability distribution of the statistic is called a sampling distribution.
SIMPLE RANDOM SAMPLING : Refersto any sampling method that has the following properties. – the population consists of N objects – The sample consist of n objects – İf all posible samples of n objects. The sampling method is called simple random sampling.
STANDARD ERROR : İs a measure of the variability of a statistics – ıts an estimate of the standard...

...indicated to what kind of test was going to be used and since I claimed that the rural area were going to have a lower average number of beds it states that the shaded area on the critical value test will be less than zero.
Table 1. Descriptive statistics for the given null and alternative hypothesis that includes the sample, mean, median, standard deviation, maximum values, and minimum values.
Sample Size
Mean
Median
Standard Deviation
Maximum Value
Minimum Value
Rural Area...

...distributed, and its standard deviation is unknown. We want to test the following hypotheses: H0: µ=12 vs Ha: µ≠12. If the value of the test statistic is -1.73 based on a sample of size 20, what type of test statistic is it and what is the corresponding p-value?
a. z statistic; 0.0287
b. z statistic; 0.0574
c. t statistic; approximately 0.10
d. t statistic; approximately 0.05
12. The diameter of 3.5...

...StatisticsStatistics
Text references: Lecture Notes Series: Engineering Mathematics Volume 1, 2nd Edition, Pearson
2006.
5.1
Sampling Theory
A sample is good when it is able to represent a population well. Thus when we have a
good sample, instead of having to look at the population to get some ideas of its
characteristics, we can turn to the sample for inference regarding its population. Since
we are going to be dealing with samples, we shall...

...public transportation. Collect secondary data from several websites of U.S. Departments of Transportation, U.S. Census Bureau etc. to test this hypothesis from the survey. Write a short essay to explain the data.
According to the “Bureau of Labor Statistics” of United States Department of Labor in 2008 2009, we chose:
A sample of 143,338,000 working people on December, 2008
A sample of 137,792,000 working people on December, 2009
Based on the report “Public Transportation...

...stretches to the right more than it does to the left and is somewhat positively skewed looking at the histogram.
III. Data description
Descriptive statistics
Results
Mean
146.875
Median
150
Mode
150
Standard deviation
67.7911124
Standard error
8.47388905
Range
330
Min
20
Max
350
Descriptive statistics:
We use two different descriptive statistics to infer about our population from our sample.
I. Central tendency:
We wanted to measure and estimate...

...James Lee
For my experiment, I will be taping a dime to a quarter and see if that will affect the probability of flipping heads. I will see whether it will appear either heads or tails significantly more times than the other or not.
My null hypothesis is that taping a dime in the back of a quarter will not significantly affect the probability of the frequency of appearing either heads or tails. I want to reject the fact that taping a dime will make any significant difference. The sample...

...
Statistics
BUS308: Statistics for Mangers
Instructor:
Learning Statistics
Statistical data has become an item that we see all around us in our everyday lives, from television programs talking about selling products or politicians using data to show how they perform in their jobs, in hopes to be reelected. Throughout the course in Statistics for Managers, I have learned many things on how the use of statistical information can...

## Share this Document

Let your classmates know about this document and more at StudyMode.com