Digital cameras 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 “Digital Camera” data in Chapter 10_HW_Data.xls contains the battery life of 29 subcompact cameras and 16 compact cameras (data extracted from “Digital Cameras,” Consumer Reports, July 2009, pp.28-29). Assuming that the population variances from both types of digital cameras are equal, is there evidence of a difference in the mean battery life between the two types of digital cameras (α = 0.05)? Determine the p-value in (a) and interpret its meaning. Is there evidence of a difference in the variability of the battery life between the two types of digital cameras? (use α = 0.05) Based on the results of (c), which t test should you use to compare the mean battery life of the two types of cameras?
Digital cameras 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 “Digital Camera” data in Chapter 10_HW_Data.xls contains the battery life of 29 subcompact cameras and 16 compact cameras (data extracted from “Digital Cameras,” Consumer Reports, July 2009, pp.28-29).
Assuming that the population variances from both types of digital cameras are equal, is there evidence of a difference in the
Determine the p-value in (a) and interpret its meaning.
Is there evidence of a difference in the variability of the battery life between the two types of digital cameras? (use α = 0.05)
Based on the results of (c), which t test should you use to compare the mean battery life of the two types of cameras?
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