Answer:
A. Least: 69; Greatest: 84
B. 74, 79, 78, 82, and 84
Explanation:
A.
We want to find the least value in the data set, which will be the smallest number. Look at all the given values:
74 79 78 79 82 73 82 84 80 84 74 76 69 78 81
It looks like 69 is the only number in the 60s, which is the smallest range, so we know that 69 is the least value.
We also want to find the greatest value, which will be the largest number. Look at the given values again:
74 79 78 79 82 73 82 84 80 84 74 76 69 78 81
We see that the largest number must be in the 80s, and it turns out to that 84 is the greatest value.
B.
We want to find the data values with the greatest frequency. This basically just means which numbers appear the most number of times. Let's count for each number:
74: two times
79: two times
78: two times
82: two times
73: one time
84: two times
80: one time
76: one time
69: one time
81: one time
We see that the most number of times a number appears is 2, but there are many numbers that appear 2 times: 74, 79, 78, 82, and 84. All of these are the data values with the greatest frequency.