the hydrogen atom contains a proton mass 1.67*10^-24g. An oxygen atom has a mass of about 2.66*10*-23g. About how many times as great is the mass of an oxygen atom than the mass of a hydrogen atom? Show your work.

People end up tossing 12% of what they buy at the grocery store. assume this is the true population proportion and that you plan to take a sample survey of 540 grocery shoppers to further investigate their behavior. a. calculate the mean and the standard error for the sample proportion p. b. describe the sampling distribution of p in part a. draw a graph of this probability distribution with its mean and standard deviation. what is the probability that your survey will provide a sample proportion more than 15%? c. d. population proportion? what is the probability that your survey will provide a sample proportion within + 0.03 of the