Is 74.3 greater than 7.43

What is the value of x in the diagram below?

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?

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15