October 2012
Beginner
420 pages
9h 37m
English
book
Industrial Statistics with Minitab
by Pere Grima Cintas, Lluis Marco Almagro, Xavier Tort-Martorell Llabres
Content preview from Industrial Statistics with Minitab
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10.3 Comparison of Two Proportions
Stat > Basic Statistics > 2 Proportions
Example 10.3:
A survey has been carried out among 300 clients of a northern region and it turned out that 33 of them are unsatisfied with the company's service. In the southern region, 250 clients have been consulted and 22 of them expressed discontent. Given this information, can we affirm that the proportion of unsatisfied clients differs between both regions?
In this case, it is not necessary to enter values in the worksheet, since they are entered directly in the dialog box.
In any of the two cases, since the p-value is greater than 0.05 (usual critical value), it is not possible to conclude that the proportions are significantly different.
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