Digital camers have taken over the majority of the point-and-shoot camera market. One of the important features of a camera is the battery life as measured by the number of shots taken until the battery needs to be recharged. The data file Digitalcameras contain the battery life of 31 subcompact cameras and 15 compact cameras(data extracted from "Cameras,".
Assuming that the population variances from both types of digital camersa are equal, is there evidence of a difference in the mean battery life between the two types of digital camers (a=0.05) and also determine the p-value in and interpret its meaning