The level of pesticides found in the blubber of whales is a measure of pollution in regions of the ocean. a sample of eight male minke whales in the west greenland area of the north atlantic finds a sample mean pesticide level of 357 nanograms per gram (ng/g) of blubber. suppose that the concentration of pesticides in all such whales varies normally with a known population standard deviation of 50 ng/g. a 90% confidence interval to estimate the mean level of pesticide in minke whales in this region is:

Step-by-step explanation:

The confidence interval for population mean is given by :-

Given : Sample size : , which is a small sample (n<30) , so we apply t-test .

Sample mean :

Standard deviation :

Significance level :

Critical value :

Now, a 90% confidence interval to estimate the mean level of pesticide in minke whales in this region  will be :-

Hence, the 90% confidence interval to estimate the mean level of pesticide in minke whales in this region is

725 parts per hour.

step-by-step explanation:

hi there, this answer is actually really simple.

you can set it up as 1450/2 or 3625/5 to find the answer.

they want to know how much per hour is being made, so you just divide.

1450/2=725.

and that's how many are produced per hour.

hope this . : )

answer: sorry i can't you.

step-by-step explanation: