Select the best answer for each question below. You get 10 points for each corre

Question

Select the best answer for each question below. You get 10 points for each correct answer. (q1 - q3) Product filling weights are normally distributed with a mean of 300 grams and a standard deviation of 10 grams. A sample of size 6 is taken the process. Which is the standard deviation of the sample? A) 2.45 B)30 C)4.08 D) 10 Which are the control limits for the x chart of the process? A) 287.76 - 312.24 B) 290 - 310 C) 295 - 305 D) 276.23 - 324.78 For the sample below, the process is _____ 287 294 312 334 298 323 A) In control B) Out of control (q4 - q5). A process sampled 10 times with a sample of size 6 resulted in x = 22.6 and R = 1 4. The upper and lower control limits for x chart are: A) 19.8 - 24.7 B) 21.97 - 2322 C) 20.23 - 21 65 D)24.3 - 27.8 The upper and lower control limits for R chart are: A) 0.56 - 3.4 B) 0 - 2.004 C) 0.23 - 1.56 D) 0 - 2 6

Explanation / Answer

a) Standard error is 10/sqrt(6)=4.08 . option C

b) mean is 300 , z=3 for control

thus upper limit is 300+3*4.08 .=312.24 . thus option A

c) out of range since it is beyond 312.24

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