Effect Size
/in Uncategorized /by admineveral statistical tests have a way to measure effect size. What is this, and when might you want to use it in looking at results from these tests on job related data?
Guided Response: Review several of your classmates’ posts. Respond to at least two of your classmates.
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what is the gradient of the tangent to the curve y=1/Square root of X at the X coordinate 6
/in Uncategorized /by adminStatistic
/in Uncategorized /by adminPROBLEM 4
Classified ads in the Ithaca Journal offered several used Toyota Corollas for sale. Listed
below are the ages of the cars and the advertised prices.
Age (yr) Price Advertised ($)
1 13,990
1 13,495
3 12,999
4 9,500
4 10,495
5 8,995
5 9,495
6 6,999
7 6,950
7 7,850
8 6,999
8 5,995
10 4,950
10 4,495
13 2,850
(a) Report the linear correlation coefficient value and comment on the form, the
direction, and strength of association between the age of a car and the advertised
price.
(b) Report the equation of the least-squares regression line. Interpret the coefficients.
(c) Report and interpret the value of the coefficient of determination.
(d) Carry out a T-test about correlation ( H1:p≠0). Use a 5% level of significance.
EXPECTATIONS
Draw graphs and charts when appropriate and necessary to demonstrate your
reasoning! Label all graphs and charts!
Display formulas. Write complete sentences to summarize your conclusions.
If use any table values, clearly state which tables you used (e.g. Table A-2, etc.).
You may attach your excel output when appropriate or necessary (e.g. a scatterplot,
etc.)
HYPOTHESIS TESTING QUESTIONS
Your work for all statistical hypothesis testing questions should include the following:
1. Established Ho and Ha.
2. Summary statistics (either computed or given in the problem)
3. The name of the test (e.g. 2sampleTtest or T-test about correlation, etc.)
4. A formula to compute a test statistic (e.g. 1Prop-Z test statistic, etc.)
5. A p-value of the test and/or a critical value from a statistical table.
6. Clearly state the decision rule you use the reach a conclusion. (You may have to
sketch a graph to show rejection regions.) Do you “Reject Ho†or do you “Fail to
Reject Ho�
7. State your conclusion in plain language. Use complete sentences.
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a single cell divides every 5 mins. how long does it take for one cell to become more than 10,000?
/in Uncategorized /by adminYour group will analyze the 2011 performance of Jefferson Industrial Machine by using their 2011 financial statements, and prepare the…
/in Uncategorized /by adminOur Company
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