A sample of 64 is taken from a population, with the mean of the sample being 119 and the standard deviation of the sample being 16. What is the 99.7%
confidence interval for the mean of the population?
A. (117, 121)
B. (118, 120)
C. (113, 125)
D. (115, 123)

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered