Answer: (30.49 years, 42.31 years)
Step-by-step explanation:
The formula to find the confidence interval is given by :-

, where
= Sample mean
z* = Critical value.
= Population standard deviation.
n= Sample size.
As per given , we have
n= 40
We know that the critical value for 99% confidence interval : z* = 2.576 (By z-table)
A 99 percent confidence interval for µ, the true mean age of guests will be :

∴ a 99 percent confidence interval for µ, the true mean age of guests = (30.49 years, 42.31 years)
When within the Course of human occasions, it gets to be fundamental for individuals to break up the political groups which have associated them with another, and to look forward to the powers of this world, the partitioned and the same to station to which the Laws of Nature and of Nature's God entitle them, a conventional regard to the conclusions of mankind requires that they ought to pronounce the causes which.
Answer:
$25.50
Step-by-step explanation:
So we have a 15% off coupon. We can multiply 25×.85 to find our new price.
Our total is now $21.25
Now to find the tip do $21.25 +(.2 × 21.25)
*The .2 is 20 percent of our discount price.*
We then get $25.50
Answer:
Maggie is 13 years old.
Step-by-step explanation:
The explanation is attached.