Homework Help: statistic

Posted by Anonymous on Thursday, January 12, 2012 at 10:06pm.

One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts to be within ą0.005 inch of the length specified by the automobile company. The data in the file Steel comes from a sample of 100 steel parts. The measurement reported is the difference in inches between the actual length of the steel part, as measured by a laser measurement device, and the specified length of the steel part. For example, the first value, 0.002, represents a steel part that is 0.002 inch shorter than the specified length.
a. Construct a percentage histogram.
b. Is the steel mill doing a good job in meeting the requirements set by the automobile company? Explain.

statistic - Stat, Thursday, January 12, 2012 at 10:08pm
nevermind above question, this question please:

Suppose there are three balls in a box. On one of the balls is the number 1, on another is the
number 2, and on the third is the number 3. You select two balls at random and without
replacement from the box and note the two numbers observed. The sample space S consists of
the three equally likely outcomes {(1, 2), (1, 3), (2, 3)}. Let X be the sum of the numbers on the
two balls selected.

Referring to the information above, the variance of X is... (EXPLAIN)

Answer this Question

Related Questions

College Business Statistic - One operation of a mill is to cut pieces of steel ...
Math - I can't to get this problem. Perform the indicated operation 11 -6/7...
math - Keisha had two pieces of ribbon of equal length. She cut the first piece...
geometry - for that some problem: A board that is 12 feet long must be cut into ...
algebra - a 3 1/2 foot piece of rope is cut into two pieces. one of these pieces...
math - A 24-inch piece of string is cut into two pieces. One piece is used to ...
math - Alog is cut into four pieces in 12 seconds. At the same rate, how long ...
music help PLZ - i am on windows media player tryin to make a mix cd. i made a ...
The advantages of ball mill - The advantages of Ball Mill is as follows: (1) ...
Calc - A wire 100 inches long is to be cut into two pieces. One of the pieces ...

For Further Reading

First Name:
School Subject:
Answer: