It is known that the variance of a population equals 1,936. A random sample of 121 has been selected from the population. There is a .95 probability that the sample mean will provide a margin of error of . Group of answer choices 31.36 or less 1,936 or less 344.96 or less 7.84 or less

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?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Which point has an coordinates of (2,0) ? a