The data in the following table represent four-week growth rates for depleted chicks at different dosage levels of vitamin B, by sex.

Use the information provided in the next table to answer the following questions.

a. Determine the dose-response straight lines separately for each sex, and plot them on the same graph.
b. Test whether the slopes for males and females differ.
c. Find a 99% confidence interval for the true difference between the male and female slopes.
d. Test for coincidence of the two straight lines.

Transcribed Image Text:

Males Females Growth Rate Log, Dose Growth Rate Log, Dose ix) 18.5 22.1 15.3 23.6 26.9 20.2 24.3 17.1 14.3 21.6 24.5 20.6 23.8 27.7 31,0 29.4 30,1 28.6 34.2 37.3 33.3 31,8 40.2 0.301 0.301 .301 0.602 0.602 0.602 0.903 0.903 0.903 1.204 1.204 1.204 1.204 1.505 1.505 1.505 0.301 0.301 0.301 0.602 0.602 0.602 0.903 0.903 0.903 0.903 1.204 1.204 1204 1.505 1505 I.Sos 30.1 28.1 30.3 33.0 35.8 32.6 36.1 30.5 Sex Group β. B, SyL 0.922 14825.93 10.5553 Males Females 6 4 178 6 15.656 27.84 27.16 0.187 0.1812 0.807 12.735 8.47190.788