Aphysicist examines 28 sedimentary samples for mercury concentration. the mean mercury concentration for the sample data is 0.863 cc/cubic meter with a standard deviation of 0.0036. determine the 98% confidence interval for the population mean mercury concentration. assume the population is approximately normal. step 2 of 2: construct the 98% confidence interval. round your answer to three decimal places.

Step-by-step explanation:

The confidence interval for population mean is given by :-

, where n=sample size

= sample mean

=sample standard deviation

= critical t-value (for two tailed )

Let   be the confidence interval for the population mean mercury concentration.

As per given , we have

Sample size : n= 28

degree of freedom = 27   [df=n-1]

Sample mean : cc/cubic meter

Sample standard deviation : s= 0.0036

Significance level :

Critical two-tailed test value :

 (Using t-distribution table.)

We assume the population is approximately normal.

Now, the 98% confidence interval for the population mean mercury concentration will be :-

Required confidence interval :

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

its an acute right triangle

step-by-step explanation: