3/10 is the fraction that matches 30%.
Answer: R=8
Step-by-step explanation: R-7=1, R+7=1+7, R=8.
To find the standard error, divide the standard deviation by the square root of the sample size
standard deviation = 7.5
sample size = 25......sqrt 25 = 5
standard error = 7.5 / 5 = 1.5 <==
Answer:
The answer is a 20% increase
Hope this helps!
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