Sets found in the same folder
When faced with a power hitter, many baseball teams utilize a defensive shift. A shift usually involves putting three infielders on one side of second base against pull hitters. Many believe that a power hitter's batting average is lower when he faces a shift defense as compared to when he faces a standard defense. Consider the following batting averages of 10 power hitters over the 2010 and 2011 seasons when they faced a shift defense versus when they faced a standard defense.
b. Calculate the value of the test statistic and the -value. Assume that the batting average difference is normally distributed.
Commercial eggs are produced from different housing systems. Refer to the Food Chemistry (Vol. 106, 2008) analysis of four different types of egg housing systems, Exercise (p. 546). Recall that the four housing systems were cage, barn, free-range, and organic. In addition to the housing system, the researchers also selected the weight class (medium or large) for each sampled egg. The data on whipping capacity (percent overrun) for the 28 sampled eggs are displayed in the next table. The researchers want to examine the impact of both the housing system and weight class on the mean whipping capacity of the eggs. In particular, they want to know whether the difference between the mean whipping capacity of medium and large eggs depends on the housing system.
e. Analyze the main effect test for weight class (using . What does this suggest, practically?