You intend to draw a random sample of size n = 664 from a population whose parameter is p = 0.12 What is the mean of the distribution of sample means? μ ˆ p = 0.12 What is the standard deviation of the distribution of sample means? (Report answer accurate to 2 decimal places.) σ ˆ p =

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?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250