Maurice Tutor

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Teaching Since: May 2017
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  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 11 Jun 2017 My Price 14.00

two groups are statistically significant

The difficult part is deciding whether the differences you observe in two groups are statistically significant. The confidence intervals can help you make that decision. When comparing the means of two groups, subtract one mean from the other. If they are the same, the answer will be zero. Remember that with the 95% confidence interval there is a range of values that contain the true mean in 95 of 100 samples. If zero is part of that range then the difference of the two means is not statistically significant. But what happens when you are comparing odds as in odds ratios? Since this is a ratio, divide the odds of one group by the odds of the other. If they are the same the answer is one. Again, remember that with the 95% confidence interval there is a range of values that contain the true mean in 95 of 100 samples. Now, however, if one is part of that range the ratio of the two odds is not statistically significant. Keep this in mind as you complete this week's Application Assignment.

 

To complete this Assignment, answer the following problems:

 

Problem 5.1a: Given the data set Paired_t.sav, use SPSS to calculate the 95% confidence interval of the difference of means of Sys_BP_1 and Sys_BP_2. Interpret the output.

 

Problem 5.1b: Given the data set Independent_t.sav, use SPSS to calculate the 95% confidence interval of the difference of means of BMI as grouped by gender. Interpret the output.

 

Problem 5.2: Using the following 2x2 table, calculate the odds ratio and its 95% confidence interval. Interpret the confidence interval.

 

 

 

Exposure to Asbestos

Disease yes (Cancer case)

Disease no (control

Total

      

YES

160

80

240

      

NO

20

100

120

      

TOTAL

180

180

360

    

Answers

Maurice Tutor
(5)
Status NEW Posted 11 Jun 2017 08:06 PM My Price 14.00

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