Amarketing research company is estimating the average total compensation of ceos in the service industry. data were randomly collected from 18 ceos and the 98% confidence interval for the mean was calculated to be left parenthesis 2181260 comma 5836180 right parenthesis . what additional assumption is necessary for this confidence interval to be valid?

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