A biscuit factory produceces cream crakers. Packets are samples at houly interva

Question

A biscuit factory produceces cream crakers. Packets are samples at houly interval and the weight in grams of the content. The results are from seven samples each of size five taken at a time when the production wat thought to be satisfactory. The target is 210 g.

A. Estimate the standard deviation of the process

B. Drw the two contorl charts (xbar and R bar) and plot the points. Comment on the current state ot the process.

C. What action if any would you recomment if the next sample was.

1) 196,202.5,189,197.5,197

2) 204.5,214,206,207,211

3) 188.5, 212.5, 220, 215, 208

4) 206, 214.5, 208.5, 209 , 208

D. the upper specificaiton limit is 220g and lower specification limit is 200 g , estimate processing capability ratio Cp: and comment on the abliity of the process to meet this specification.

1 2 3 4 5 6 7 209 214.5 204.5 217.5 211 224 210 211.1 210 209 216 198 220 208 213.5 215 198.5 212 209.5 224 210 205 201.5 203 214 213.5 218.5 220 210 241 213.5 209.5 213.5 210 211

Explanation / Answer

Std dev = 7.888

1 2 3 4 5 6 7 209 214.5 204.5 217.5 211 224 210 211.1 210 209 216 198 220 208 213.5 215 198.5 212 209.5 224 210 205 201.5 203 214 213.5 218.5 220 210 241 213.5 209.5 213.5 210 211 std dev 7.887898

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