If a fraction is greater than 1, what do you know about its reciprocal

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?

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

I’m confused on how to work the pie charts