Answer: 10.09 or 15.03
explanation:
Formula for confidence interval(CI) is CI = x ± z * (sd/ Sqrt(n))
Where x is mean = 12.56
z is value for normal distribution 99% confidence =2.58
sd is standard deviation=3.03
Sqrt is square root
n is sample population = 10
CI =12.56±2.58*(3.03/sqrt(10)
=12.56±2.47
=15.03 or 10.09
With 99% confidence, the average number of commercial minutes is between 10.09 and 15.03 minutes, based on sample data.
Answer:
the answer is a
Step-by-step explanation:
70 to a 100 is 30 just remove the zero is 3
Answer:
15x12=180mm
Step-by-step explanation:
Answer:
the percent of change is
Step-by-step explanation:
Step 1
Convert the time in seconds
we know that
----> represent the
Step 2
the change of the time is equal to
Step 3
by proportion
find the percent of change
1. 4 7/20
2. 2 3/4
I hope I helped
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