Question

You want to know the reproducibility of blood test measurements, so you split each blood sample into two equal parts then subject each sample to the same hormone detection tsts. You have 5 subjects where you have the date reproduced in Table 2. It might be useful to group the data in a way that ignores the specific type of hormone tested and treat all the tests as hormone tests that presumable should have yielded the same results.

Table2. Paired data to test the reproducibility of blood tests for hormone levels. The blood sample from each subject was split into two identical replicates that were tested for the amounts of 4 hormones

Rep 1	Rep 2
45.9	52.1
25.5	30.4
76.9	76
26.7	21.2
35.5	35.6
11.1	15
90.9	72.6
20.1	18.9
28.6	28.5
8	8.1
33.4	31.5
16.4	14.7
44.8	44.7
20.7	16.9
70.7	76.5
38.7	33.8
24.9	24.9
5.8	8.4
55.7	62.1
32.5	30

Answer 1