Answer:
The 95 percent confidence interval for the population mean is between 14.736 tons and 16.864 tons.
Step-by-step explanation:
We have the population's standard deviation, so we can find the normal confidence interval.
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
So it is z with a pvalue of 
, so 
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 15.8 - 1.064 = 14.736 tons
The upper end of the interval is the sample mean added to M. So it is 15.8 + 1.064 = 16.864 tons
The 95 percent confidence interval for the population mean is between 14.736 tons and 16.864 tons.
Answer:
140
Step-by-step explanation:
3.5×40=140
.........................
Answer:
0.098
Step-by-step explanation:
Given that when filling out the 2000 Census, people could choose one of four options to describe their marital status.
Data from the 2000 Census were used to compute the following probabilities
Marital status Never married Married widowed Divorced total
Prob 0.239 0.595 0.068 0.098 1
Actually we were not given probability for divorced but using total probability =1 we arrived at the probability for divorced as
1-sum of the remaining probabilities
=
the probability that a randomly selected U.S. adult is divorced
= 0.098
Your answer will be 6. The reason it is six is that 24/6 = 4 and 4 X 6=24.
Answer:
$2.85
Step-by-step explanation:
