A set of data items is normally distributed with a mean of 600 and a standard deviation of 50. Find the data item in this distribution that corresponds to the given Z-score
z = 2.5
The data item that corresponds to z=2.5 is?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4