Express 325 ml as a fraction of a litre

Step-by-step explanation:

We are asked to represent 325 ml as a fraction of a liter.

We know that one liter is equal to 1000 ml.

To represent 325 ml as a fraction of a liter, we will divide 325 by 1000 as:

We can reduce our fraction as:

Therefore, our required expression would be .

(a)

(b) The best  point estimate of is the sample mean

The margin of error =  4.552

Step-by-step explanation:

Given : The confidence interval for the population mean =  (13.046 , 22.15)

Sample mean :

Standard deviation :

Sample size :

a. Let represents the population mean.

Then we can write the confidence interval for the population mean as :-

b. The best  point estimate of is the sample mean

Also, the lower limit of confidence interval can be written as

i.e.

Hence, the margin of error =  4.552