In Exercise 13 of Chapter 1, the half-life of aminoglycosides from a sample of 43 patients was recorded. The data are reproduced in Table 5.21. Use these data to see whether there is a significant...

In Exercise 13 of Chapter 1, the half-life of aminoglycosides from a sample of 43 patients was recorded. The data are reproduced in Table 5.21. Use these data to see whether there is a significant difference in the mean half-life of Amikacin and Gentamicin. (Use α = 0:10.)

Exercise 13

Eight samples of effluent from a pulp mill were each divided into 10 batches. From each sample, 5 randomly selected batches were subjected to a treatment process intended to remove toxic substances. Five fish of the same species were placed in each batch, and the mean number surviving in the 5 treated and untreated portions of each effluent sample after 5 days were recorded and are given in Table 5.20. Test to see whether the treatment increased the mean number of surviving fish.