So if you have been told your thyroid gland died or stopped working, ask your doctor to explain why. Make sure you have had the proper testing including a complete thyroid panel and thyroid antibody tests run. The antibody tests will catch 80-90% of the patients with Hashimotoâs.
The F-test is designed to test if two population variances are equal. It does this by comparing the ratio of two variances. So, if the variances are equal, the ratio of the variances will be 1. If the null hypothesis is true, then the F test-statistic given above can be simplified (dramatically). This ratio of sample variances will be test statistic used. If the null hypothesis is false, then we will reject the null hypothesis that the ratio was equal to 1 and our assumption that they were equal.
MS is the mean squared error, which is SS/df for each source of variation. The F-statistic is the ratio of the mean squared errors (13.4309/2.2204). The p-value is the probability that the test statistic can take a value greater than or equal to the value of the test statistic, i.e., P(F > 6.05).