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One operation of a mill is to cut pieces of steel into parts that are used in the frame for front seats in an automobile. The steel is cut with a diamond saw, and the resulting parts must be cut to be within+/- 0.005 inch of the length specified by the automobile company. The measurement reported from a sample of 100 steel parts (stored in Steel) 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 observation, -0.002 represents a steel part that is 0.002 inch shorter than the specified length.
a. Construct a 95% confidence interval estimate for the population mean difference between the actual length of the steel part and the specified length of the steel part.
b. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)?
Do you think that the assumption needed in order to construct the confidence interval estimate in (a) is valid? Explain.
Select the ordered pair from the choices below that is a solution to the following system of equations.
A woman 1.6 m tall stands 2.2 m in front of a plane mirror. What would be the required minimum height of the mirror if she were to stand 4.6 m away?
How large a surface area in units of square feet will one gallon of paint cover if we apply a coat that is .1 millimeter thick?
Suppose that f is continuous on [a,b]. Prove that f is integrable, i.e., ( the integral symbol with b at top and a at the bottom) f exists.
If I am correct, the answer guide says this one converges but my answer is going to infinity which is diverges. I need to see your steps to compare with mine please.
A plane is heading due south with an airspeed of 225 mph. A wind from a direction of 50° is blowing at 13 mph. Find the bearing of the plane.
A. At what rate are sales changing in the year 2002? B. What happens to sales in the "long run" (that is, as t )?
A bowl is shaped like a hemisphere with a diameter of 60 cm. Water is poured into the bowl to depth of 12 cm. Find the volume of the water in the bowl.
A textbook store sold a combined total of physics and psychology textbooks in a week. The number of physics textbooks sold was two times the number of psychology textbooks sold. How many textbooks of each type were sold?
what is the probability of being a 3 cards,followed by a 4 ,followed by a 5,whitout replacing any of the cards? is this an independent or dependent event?
How many of the students surveyed took math, English or physics? How many students took none of the three subjects?
find the equation of the largest sphere that passes through the point (-1,1,4) and is such that each of the points (x,y,z) inside the sphere satisfies the condition x^2+y^2+z^2
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