Statistics at square one. XII--The t tests (continued).

Statistics at square one: XVIII-Correlation.

to recover. All that one can say is that it is likely that many fail to achieve their full potential in adult life. Recent studies have shown that concentration of care on labour and the first weeks of life, which are the most dangerous times in the life of the baby, has paid dividends. By using continuous monitoring for all women, fetal death during labour can be eliminated. Equally, the provi...

Statistics at square one. III--Standard deviation.

Statistics at square one. XX-Correlation (concluded).

Statistics at square one. VIII--Differences between means.

We saw in Part VI that the mean of a sample has a standard error, and a mean that departs by more than twice its standard error from the population mean would be expected by chance only in about 500 of samples. Likewise the difference between the means of two samples also has a standard error. We do not normally know the population mean, so we may suppose that the mean of one of our samples est...

Statistics at square one. VI. Variation between samples.