Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 148148 millimeters, and a variance of 3636. If a random sample of 4040 steel bolts is selected, what is the probability that the sample mean would be less than 147.2147.2 millimeters

The contents of 3838 cans of coke have a mean of x¯¯¯=12.15x¯=12.15. assume the contents of cans of coke have a normal distribution with standard deviation of σ=0.12.σ=0.12. find the value of the test statistic zz for the claim that the population mean is μ=12.μ=12.

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample

What is the slope of the line (-7,2) (4,6)