The ages of students in a school are normally distributed with a mean of 15 years and a standard deviation of 2 years. Approximately what percent of the students are between 14 and 18 years old?

24.17%

62.47%

30.85%

93.32%

Question

The ages of students in a school are normally distributed with a mean of 15 years and a standard deviation of 2 years. Approximately what percent of the students are between 14 and 18 years old?

 24.17%

 62.47%

 30.85%

 93.32%

amistre64 · Answer

doesnt seem to be a good empirical rule for this, so you might need to table it out;  unless you got a stats calculator handy

anonymous · Answer

no it doesnt tell me a table/ i mean it doesnt have a table

amistre64 · Answer

can find the zscores for the stated numbers?

anonymous · Answer

no i really suck at this

amistre64 · Answer

how many standard deviations does it take to get from the mean, to a stated number?

how many standard deviations are between 15 and 18?
how many standard deviations are between 15 and 14?

anonymous · Answer

i DOnt know

amistre64 · Answer

then it might be best if you review your material until you have some basic understanding of the principles involved.