PLEASE HELP ASAP Henry bought 2 shirts. Each shirt cost $14, and he has a coupon for 20% off. How much will Henry pay for the sh
irts? Henry's work is shown below...what did he do incorrectly? Complete this sentence from the choices given: Henry ___________ the discount instead of _________ the discount
1 answer:
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Answer:
--- Variance
Step-by-step explanation:
Given
Solving (a): Calculate the mean.
The given data is a grouped data. So, first we calculate the class midpoint (x)
For 51 - 58.
For 59 - 66
For 67 - 74
For 75 - 82
For 83 - 90
So, the table becomes:
The mean is then calculated as:
-- approximated
Solving (b): The sample variance:
This is calculated as:
So, we have:
-- approximated