Question

The following data were obtained at the same laboratory. Assume 95% confidence level.

Worker A                  x = 25.8 ng/mL          s = 0.65           n = 4 samples

Worker B                  x = 19.7 ng/mL          s = 0.45            n = 6 samples

(Note; x = mean)

Find the pooled standard deviation

Use the t-test to compare the results obtained by the 2 workers.

Use the F-test to compare the standard deviations

Find the pooled standard deviation.

Answer 1

check the calculations. And check f value from table.