(Answered) Bricks are produced in lots of size 1000 before shipping a

Statistics

Bricks are produced in lots of size 1000. Before shipping a lot, a sample of 25 bricks is selected and inspected for quality. Two random variables are of interest. These x, the number of chips per brick, and I, the hardness of the brick. Assume hardness is measured a continuous scale from 1 to 10 with larger numb indicating a harder brick.

1952_larger numb indicating a harder brick.png

(a) What is the name of the family of random variables to which X belongs?

(b) Approximate the mean, vanance, standard deviation, and median of X bases: these data.

(c) Construct a stem-and-leaf diagram for the hardness measurements. this diagram, would it be unrealistic to assume that y is approximately distributed?

(d) Approximate the mean, variance, standard deviation, and median of y.

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