Suppose that a set of scores has a mean of 5 and standard deviation of 2. What (raw) score x corresponds to a z score of -2.0? 1
2
6
None of these

Multiplying an even number of negative numbers gives an answer that is choose from:

Click on the y intercept. -x +4 i know you cant click on it so could you just say the coordinates like (example - (1,0) you so much.

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?