Question

8.3.130 ofonprie coton (mou colected from organic sol Construct a 90% oorddence 16.51 14.90 15 35 520 29.80 10.30 881 30.91 19.80 27.10 20.46 20.46 8.09 interval for the mean n of dissolved organic carbon oolected trom organic soi (Noe 16.73 mt ands 844 14.86 14.86 Cick here to view pge 1 of the table of ortical values for the tdistritbution a99% confidence rterval the mean oorcentration of dissolved orgaïc carbon o lected bom ogane so. □mp. to□mp. (Use-dng oder. Round to two deemal places as needed)

Answer 1

Here population standard deviation is not given and we use sample standard deviation(s) instead of population standard deviation ( ). Also sample size is not sufficiently large( >= 30) so we need to assume that the sample comes from normal population. Then we can used one sample t confidence interval for population mean( )

Using minitab:

Step 1) Click on Stat>>>Basic Statistics >>1 sample t...

Select summarized data

Sample size: 16

Mean: 16.73

Standard deviation: 8.44

Step 2) Click on Option

Confidence level = 99

Alternative: Not equal

Then click on OK

Again Click on OK

Then we get the following output

Therefore, 99% confidence interval is from 10.51 mg/L to 22.95 mg/L