Large manufacturing company in indianapolis produces valves for the chemical industry. according to specifications, one particular valve is supposed to have a five-inch opening on the side. quality control inspectors take random samples of these valves just after the hole is bored. they measure the size of the hole in an effort to determine if the machine is out‑of‑adjustment. the measurement of the diameter of the hole represents which level of data?

What is the approximate circumference of the circle shown below?

What is the distance between the points (2, 5) and (5,9)?

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.