Answer:
Mean: 69 in
Median: 69 in
Mode: 66 in
Explanation:
To calculate the median, we need to find the average of all the heights. Therefore, we need to add up all the heights and divide it by the number of adults.
I'm going to write out a small part of the equation, since it would take way too long to write.
63+63+65+66+66+66+66+67+67+67 ...
Notice how there are two 63s since the frequency is 2 for 63, and there is one 65 since the frequency is 1. If you continue this process, divide this sum by the amount of frequencies, which is 23. You get 69.
To calculate the median, find the middle number of the dataset (if there is an odd amount of numbers), or the average of the two middle numbers of the dataset (if there is an even amount of numbers)
63,63,65,66,66,66,66,67,67,67,68,69,69,70,70,71,72,72,72,74,74,75,75
Since 69 is the most middle number, 69 is the median.
To find the mode, we need to find the number that occurs the most. In order words, the height that has the most amount of frequencies. This height is 66 in.