A crew of highway workers paved 1/3 mile in 1/4 hour. If they work at the same rate, how much will they pave in one hour?
1 answer:
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Answer:
D is the correct answer
Step-by-step explanation:
cylinder volume equation: v=h
Water heater x= (8.5)^2 x 48= 10895.04
Water heater y= (9.5)^2 x 44= 12475.26
Water heater z= (10.5)^2 x 32= 11083.54
A is false because water heater Y has the greatest volume
B is false because all the volume are different
C is false because z has the smallest volume
Answer:
0.024
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean and standard deviation
Suppose the true proportion of high school juniors who skateboard is 0.18.
This means that
Samples of 250 high school juniors are taken
This means that
By how much would their sample proportions typically vary from the true proportion?
This is the standard error, so:
So 0.024 is the answer.