Pitanje 4
4.
Predict what the density curve for scores on the Iowa Test of Basic Skills, a standardized test with scores from 1-12, looks like.
Predict what the density curve for the distribution of household income in the United States looks like
Predict what the density curve for female age at time of death is.
In baseball, a player’s batting average is the proportion of times the player gets a hit out of his total number of times at bat. The distribution of batting averages in a recent season for Major League Baseball players with at least 100 plate appearances can be modeled by a Normal distribution with mean μ=0.261 and standard deviation σ=0.034
Use the empirical rule to answer the following questions.
68% of MLB players had a batting average between what two values?
99.7% of MLB players had a batting average between what two values?
About what percent of Major League Baseball players with 100 plate appearances had batting averages of 0.363 or higher?
A player with a batting average of 0.227 is at about what percentile in this distribution? Justify your answer.
99.7% of students have scores between what two values?
About what percent of students scored greater than 69 on the Chapter 1 test?
A student who scored a 75 would be at about what percentile of the distribution?
Are there any problems above that you would like to go over in class? Indicate the question numbers below (Numbers refer to the Formative question number). I'll try to cover anything that is highly requested.
