Information In baseball, it’s widely believed that left-handed pitchers have an
ID: 3246450 • Letter: I
Question
Information
In baseball, it’s widely believed that left-handed pitchers have an advantage over their right-handed counterparts. About 15% of the general population is left handed, and researchers believe that the proportion of lefties is higher in the population of all current MLB pitchers. In a survey of 165 major league pitchers, 42 are left-handed.
Question 9 (1 point)
Write out the null hypothesis in words, in the context of the problem. Pay attention to the population and parameter of interest.
Explanation / Answer
The null hypothesis is given by: Proportion of lefties in the population of all current major league pitchers is equal to the proportion of lefties in the general population.
Here, the parameter of interest is the proportion of lefties of all curent MLB pitchers. The population is all current MLB pitchers.