A report says that 79 of British Columbians over the age of 25 are high school graduates A survey of randomly selected residents of a certain city included 1260 who were over the age of 25 and 955 of them were high school graduates a What are the mean and standard deviation of the sample proportion of 1260 British Columnbians over the age of 25 that are high school graduates The mean of the sampling distribution for p is The standard deviation of the sampling distribution for p is rounded to four decimal places b What is the z score assocated with the sample proportion 955 1260 2 c You wonder if the city s result of 955 unusually low thus you want to know the probability that a sample proportion is less than 955 1260 What is this probability P 9556560 1260 diel prodit on this problem