# Project #14607 - Biostatistics

I was told to use the SPSS program and I have attached the instructions/help.

NOTE: Assume we are testing at α = 0.05 for all statistical tests

In the past the average number of nursing home days required by elderly patients before they could be released to home care was 17.  It is hoped that a new program will reduce this figure.  The data below show the average number of nursing home days.  Is there evidence to suggest that the average length of stay is less than 17 days?

 3 5 12 7 22 6 2 18 9 8 20 15 3 36 38 43

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The feeding habits of two species of net-casting spiders are studied.  These species, the Dinopis and Menneus, coexist in eastern Australia.  One variable of interest is the size of the prey of each species.  Is there a difference in average prey size between Dinopis and Menneus based on the data below?

 Dinopis prey size (mm) Menneus prey size (mm) 12.9 11.9 10.2 5.3 10.2 7.1 6.9 7.5 7.4 9.9 10.9 10.3 7.0 14.4 11.0 9.2 10.5 11.3 10.1 8.8

Test of equality of variances:

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Test of means:

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It is thought that more than 85% of all children who experience chest pain will nevertheless have a normal echocardiogram.  A sample of 139 of these children yields 123 with normal echocardiograms.  Based on this sample, may we conclude that more than 85% of children who experience chest pain will have normal echocardiograms?

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 Subject Mathematics Due By (Pacific Time) 10/14/2013 12:00 pm
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