notes 30 - Using Software To Calculate Confidence Intervals...

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Using Software To Calculate Confidence Intervals Submitted by gfj100 on Wed, 11/11/2009 - 12:51 Consider again the Class Survey data set ( Class_Survey.MTW or Class_Survey.XLS ) that consists of student responses to survey given last semester in a Stat200 course. If we consider this to be a random selection of students from the population of undergraduate students at the university, then we can use this data to estimate population parameters. Estimating Population Proportion – Raw Data Using Minitab Using SPSS 1. Opening the Class Survey data set. 2. From the menu bar select Stat > Basic Statistics > 1 Proportion 3. In the text box Samples in Columns enter the variable Smoke Cigarettes 4. Click Options and edit the level of confidence (default value is 95%) 5. Click OK The following is the 95% confidence interval for the true proportion of students who smoke cigarettes at the university. Estimating Population Proportion – Summarized Data
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This note was uploaded on 05/31/2011 for the course STAT 200 taught by Professor Andyregards during the Spring '11 term at World College.

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notes 30 - Using Software To Calculate Confidence Intervals...

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