Uniform Density Curves — Unit test Answers

The salt content in snack bags of pretzels is Normally distributed, with a mean of 180 mg and a standard deviation of 15 mg. Eighty four percent of bags have a salt content higher than which value?Find the z-table here.

Scores on a national English test are Normally distributed, with a mean score of 510 and a standard deviation of 75. Jaxon’s test score is in the 85th percentile. What is his test score, rounded to the nearest whole number?Find the z-table here.

The graph shows the distribution of time (in hours) that teenagers spend playing video games per week.

A uniform density curve goes from negative 5 to positive 1.

Heights of four-year-olds are Normally distributed, with a mean of 40 inches and a standard deviation of 3 inches. At his four-year checkup, Marlon’s height is measured as taller than 70% of boys his age. How tall is Marlon?Find the z-table here.