Convert a percent to a fraction and decimal 483

Assemble the proof by dragging tiles to the statements and reasons column

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?

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.