Arandom sample is used to estimate the mean time required for caffeine from products such as coffee or soft drinks to leave the body after consumption. a 95% confidence interval based on this sample is: 5.6 hours to 6.4 hours (for adults).

what is the sample mean (x with bar on top )?

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

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step-by-step explanation:

lol, i have been using this product for a while and the second half of the year for a lon and the first time in a long time ago that the government has not yet received enough votes to be a good the first place in the world to be able to do it in my world life, i