2. Matei a scris numerele de la 45 la 99. Ce putem spune despre numărul scris exact la mijlocul șirului? a. are suma cifrelor 8 c. nu este mai mare decât 68 b. se împarte exact 4 d. este un număr impar​

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