Assignment Answers
- Answers to Assignment #1
- Answers to Assignment #2
- Answers to Assignment #3
- Answers to Assignment #4
- Advanced Examples based on Assignment #4
- Answers to Assignment #5
The Answers to Assignment #1
Here's the output:
asking price
Mean 56112.34568
Standard Error 1813.565466
Median 52900
Mode 49900
Standard Deviation 16322.08919
Sample Variance 266410595.7
Kurtosis 0.429181538
Skewness 0.781429828
Range 74000
Minimum 25900
Maximum 99900
Sum 4545100
Count 81
Confidence Level(95.0%) 3609.113807
selling price
Mean 51939.44444
Standard Error 1751.837902
Median 48000
Mode 45000
Standard Deviation 15766.54112
Sample Variance 248583818.8
Kurtosis 0.381142789
Skewness 0.797841069
Range 70000
Minimum 25000
Maximum 95000
Sum 4207095
Count 81
Confidence Level(95.0%) 3486.271919
METHOD 1
Doing the F-test Manually
using the output from the
Descriptive Statistics tool
F= 266410595.7
248583818.8
= 1.072
METHOD 2
F-Test Two-Sample for
Variances
asking price selling price
Mean 56112.34568 51939.44444
Variance 266410595.7 248583818.8
Observations 81 81
df 80 80
F 1.07171
P(F<=f) one-tail 0.37876
F Critical one-tail 1.44773
Interpretation
The null hypothesis states that the two variances are infact identical. Given that the observed F-stat had a P-value of 37.876%, we can not reject the null hypothesis at a 5, or even 10% level of significance.
Therefore, we conclude that, based upon the statistical evidence, we can accept the null hypothesis that the variance of the selling prices is the same as the variance of the asking prices.
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buec333@sfu.ca |
The Answers to Assignment #2
These answers will not be posted until week the end (ie late Friday afternoon) of week# 5.
If you do not see the answers up by Saturday morning, please email the Lab-Ta.
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buec333@sfu.ca |
The Answers to Assignment #3
These answers will not be posted until week the end (ie late Friday afternoon) of week# 8.
If you do not see the answers up by Saturday morning, please email the Lab-Ta.
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buec333@sfu.ca |
The Answers to Assignment #4
These answers will not be posted until week the end (ie late Friday afternoon) of week# 9.
If you do not see the answers up by Saturday morning, please email the Lab-Ta.
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buec333@sfu.ca |
The Answers to Assignment #5
These answers will not be posted until week the end of week# 10.
If you do not see them up by the end of that week, please email the Lab-TA and remind them.
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