How do I do this problem? Please Help! 1.75 Is honey a cough remedy? Refer to th

Question

How do I do this problem? Please Help!

1.75 Is honey a cough remedy? Refer to the Archives of Pediatrics and Adolescent Medicine (Decem ber 2007) study of honey as a children?s cough remedy, Exercise 1.21 (P. 17). The data (cough improvement scores) for the 33 children in the DM dosage group and the 35 children in the honey dosage group are reproduced in the table below. The researchers want to know if the variability in coughing improvement scores differs for the two groups. Conduct the appropriate analysis, using alpha = .10.

Explanation / Answer

We perform an F-test : 2 sample for variances using the MS EXCEL function data analysis.

This gives the following result.

Since the F value is greater than the critical value we reject the null hypothesis that there is no difference in variablility of these two samples.

F-Test Two-Sample for Variances Honey Dosage DM Dosage Mean 10.71 8.33 Variance 8.15 10.60 Observations 35 33 df 34 32 F 0.77 P(F<=f) one-tail 0.23 F Critical one-tail 0.64

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