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:
Empirical probability of deaths cause by stroke=0.004086
Empirical probability of deaths cause by kidney disease =0.001436
Death rate due to stroke is 4 times the death rate due to kidney disease.
Step-by-step explanation:
Consider the table attached in figure
No. of deaths cause by stroke = 128300
No. of deaths caused due t kidney disease = 45100
Total population = 314 x 10⁵
Formula to calculate empirical probability:
Empirical probability of deaths cause by stroke:
Percentage of deaths cause by stroke =0.4%
Empirical probability of deaths cause by kidney disease:
Percentage of deaths cause by kidney disease =0.1%
Ratio between deaths caused to stoke to deaths caused by kidney disease is 4:1 which means death rate due to stroke is 4 times the death rate due to kidney disease.
Step-by-step explanation:
Who's only here for points jk, all you have to do is 34
because it's the only smallest number there
