F(-2)when f(x) = 2x^2 - 3x + 28?

^ = squared

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5