Answer:
Critical value: 
The 90% confidence interval for the population mean bromide concentration is (0.376, 0.39).
Step-by-step explanation:
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
. This value of z is the critical value
Now, find 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 mean subtracted by M. So it is 0.383 - 0.0066 = 0.376 cc/cubic meter
The upper end of the interval is the mean added to M. So it is 0.383 + 0.0066 = 0.39 cc/cubic meter
The 90% confidence interval for the population mean bromide concentration is (0.376, 0.39).
Answer:
7.35 miles per hour
Step-by-step explanation:
Divide 29.4 by 4
x' = 24/5
The rule for variable to variable' is multiply by 6/5, shown as y to y'
The answer is r<6
yycjj. hgxs tfdg
When a population or group of something is declining, and the amount that decreases is proportional to the size of the population.
Have a good day!!