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. Solution 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 VariancesHoney DosageDM DosageMean10.718.33Variance8.1510.60Observations3533df3432F0.77P(F<=f) one-tail0.23F Critical one-tail0.64.

1. how does bactericidal uV inhibit the growth of bacteria?
Solution
Mutation causes change in the seqence of DNA base . Mutation occure naturlly in bateria is very
slow . But the rate of mutation increase in the presence of mutagen .
Mutagenic radition are of two types ionizing radiation and non ionizing radiation . uV light is
non ionizing radiation exert its mutagenic effect by exciting electron in molecules .The exciting
of electron in DNA molecule results in formation of extra bonds between adjacent pyramidines
specialky in thymine in DNA. The boundation of two pyrimidines is called pyrimidine dimer .
These dimer change 5he shape of DNA and can causes problems during replication .