1. Most of the information technology developers claim that wireless connection would give speed of at least 11 Mbps compared to wired connection. A sample of 105 computers using wireless connection shows it gives a mean of 11.7 Mbps and a standard deviation of 2.3 Mbps. a) Do you think that the wireless usage should be implemented? Test at 7% significance level). b) Repeat the test by using p-value approach. 2. A jack is usually used for raising the axle of a motor so that a wheel may be changed. It is known that the weight of the vehicle that be raised by a jack is more than 100kg. a random sample of 125 jacks with a mean of 102.2kg and standard deviation of 15.17kg is taken. a) Do you agree that a jack can raise more than a 100 kg vehicle? (use α = 0.03) b) Repeat the test by using p-value approach. 3. In a normal situation, on average, a song needs a duration of at most 3.5 minutes to be played. The duration of a random sample of 11 songs is taken, and the data are as follows: 5.32 6.53 4.52 3.20 3.39 4.00 4.10 3.15 3.47 4.01 2.33 a) By using the data, do you agree with the statement that a song needs a duration of at most 3.5 minutes to be played? (use α = 0.05) b) Repeat the test by using p-value approach. 4. A researcher needs on average, 1.2 years to complete his short-term research. A random sample of 12 researcher are taken, and the duration (in years) to complete their research are recorded as below: 4.3 1.0 1.5 1.6 1.2 0.8 2.1 2.4 0.7 1.3 0.4

a) Do these data support the stamen that a researcher needs exactly 1.2 years to complete his research? (use α=0.05) b) Repeat the test by using p-value approach. 5. Newly purchased automobile tyres of a certain type are supposed to be filled with a pressure of at most 34 psi. A random sample of 36 such tyres was selected and it gives a sample mean of 34.66 psi and a standard deviation of 2.14 psi. a) Does this sample prove that such tyres fill...

...BUSINESSSTATISTICS
Agenda
Introduction
Descriptive Statistics
One–Tailed Test About a Population Mean
t-Test Using Two Independent Samples
t-Test For Paired Samples
Analysis of Variance (ANOVA)
Regression Analysis
U.S. Patent and Trademark Office (PT0)
Descriptive Statistics
Frequency Vs Total Provisional Filings
One–Tailed Test About a Population Mean
Selected a small sample of 12 months’ provisional application filings for...

...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...

...H0: µ ≤ 3, H1: µ > 3
C H0: µ = 3, H1: µ ≠ 3
D H0: µ ≠ 3, H1: µ = 3
E None of the above
Ans: B
What is (are) the critical value(s)?
A -1.96 and 1.96
B -1.645
C -1.645 and 1.645
D 1.645
E None of the above
Ans: D
What is the calculated test statistic?
A 2.12
B 1.43
C 1.78
D 1.23
E None of the above
Ans: A
What is your conclusion? (choose the most correct answer)
A Reject Ho at the 5% level of significance.
B Accept Ho at the 5% level of...

...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...

...Normal(88.532,5.07943)
Normal(97.1033,5.04488)
Normal(107.15,5.15367)
Summary Statistics
Mean
88.532
Std Dev
5.0794269
Std Err Mean
0.2271589
Upper 95% Mean
88.978306
Lower 95% Mean
88.085694
N
500
Sum
44266
Summary Statistics
Mean
97.103333
Std Dev
5.0448811
Std Err Mean
0.2912663
Upper 95% Mean
97.676525
Lower 95% Mean
96.530142
N
300
Sum
29131
Summary Statistics
Mean...

...BUS 105e:
Statistics
By Dr Tony Halim
GBA: 27 February 2013
Done by:
Koh En Song Andrew (Q1211397)
Melissa Teo Kah Leng (E1011088)
Woon Wei Jie Jared
T 04
1.
Over the span of 100 days, the total revenue for Unicafe North and Unicafe West is $21876.60 and $22042.00 respectively. The average revenue for Unicafe North is $218.77. The average revenue for Unicafe West is $220.42. The highest revenue occurred on the 88th day for both outlets. The lowest revenue...

...3ER PARCIAL
Inferential statistics
Sampling
* The purpose of sampling is to select a set of elements (sample) from a population that we can use to estimate parameters about the population
* The bigger the sampling, the more accurate our parameters will be.
example:
In the experiment of deciding if CEGL girls are smarter that CEGL boys, which would be your statistical hypothesis?
Hypothesis testing
But now, you already gathered information about a sample
No,...

...Case Problem 1: National Health Care Association(Descriptive Statistics)
The National Health Care Association is concerned about the shortage of nurses the health care profession is projecting for the future. To learn the current degree of job satisfaction among nurses, the association has sponsored a study of hospital nurses throughout the country. As part of this study, a sample of 50 nurses was asked to indicate their degree of satisfaction in their work, their pay and...