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 )?

answer: x=60

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of