Reporting statistical inference

An example of inference for two independent samples, a test of the theory of Lamarckian inheritance.

An example of linear regression. The data for this example comes from measurements made by the US Federal Trade Commission on 25 different varieties of cigarettes.

Have you ever seen a very small estimated regression coefficient (e.g. 0.0023) for an explanatory variable that is reported with a very small P-value (e.g. P < 0.001)?

This example uses a dataset called ‘chickwts’. It is one of the inbuilt datasets provided in R software, and is popular for illustrating methods of one-way analysis of variance.

A concern during the Second World War was the provision of vitamin C to soldiers, and in this broad context, the effects of ascorbic acid and orange juice were studied in animals.

Analysis involving a two-way interaction, using the example of Crampton’s (1947) study of the effects of dose and method of delivery of vitamin C on the development of teeth in guinea pigs.

Logistic regression is used to model a binary response variable in terms of explanatory variables.

Have you ever seen an estimated odds ratio that is very close to 1 for a numerical explanatory variable which is reported with a small P-value?