Answer:
The standard deviation will be: 2.1
Step-by-step explanation:
We know that standard deviation is basically the square root of variance.
Using the formula to calculate the standard deviation

As
so the standard deviation can be calculated as:
standard deviation 


Therefore, the standard deviation will be: 2.1
It’s b because if Mandy goes 18 days and her friend goes 3 times the days she goes.
Answer:
80 and 96
Step-by-step explanation:
80 and 96
Answer:

Step-by-step explanation:





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