GUYS, PLEASE HELP ME

a. What percent of data is greater than the 13th percentile?

b. If the mean, median, and mode for a data set are all the same, what can you conclude about the data’s distribution?

c. If the mean is greater than the mode and median for a data set, what can you conclude about the data’s distribution?

d. The mean of 3 numbers is 12. Two of them are 15 and 20. What is the third number?

e. What is the relationship between variance and standard deviation?

f. You scored in the 55th percentile on the GRE. If 8,000 people took the GRE, how many people had a score at least as high as your score?