Answer:
option one is right
Step-by-step explanation:
the very first triangle is the 30 -69 -90 degree triangle ️
The sample standard deviation is 15.3.
Given data items,
84, 85, 83, 63, 61, 100, 98,
Number of data items, N = 7,
Let x represents the data item,
Mean of the data points,
Hence, sample standard deviation would be,
872
the answer is -6, 2