What is a repreval?

Why would one look at Year on year YTD share change versus YTD share change? If you flip a penny a nickel a dime and a quarter simultaneously what is the probability that the penny and the nickel will come up heads and the dime and quarter come up tails? Find the value for the correlation coefficient r X 5 1 4 2 3 Y 5 10 12 4 8? What does statistically significant mean to statisticians? What does DWT mean in regards to the weight of gold? Importance of quality control in construction? Why use robust Coefficient of variation? Using numbers 1 through 9 only using the number once make three equivalentfractions? If 3 coins are tossed simultaneously the probability of getting at least 1head is? Will learning about Probability Binomial and Poisson Probability Distributions using Excel make our studies easier? What does the slope of a mass copper penny versus the volume tell you about copper pennies? Define Sample size? What does strength mean? Where can you find statistics about traffic and safety for the road? What is interassay coefficient of variation? What is the value of the standard error of the sample mean? What is the probability of picking an 8 of diamonds from a pack of playing cards? What is nominal cover in concrete? What does it mean when a data set of 10 measurements has a mean of 15 and a standard deviation of 0? Which of these is true of unclassified data?