TO the nearest hundreth What is the relative
Frequency
OF students
who use only glasses
Age (years) uses
only Prescription Glasses
less than 10 13
10-13
33
14-17
38
use contact
lenses
2
6
18

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

How can you find the mean absolute deviation (mad) for this set of data?