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A manufacturing company wishes to estimate the number of items that its workforce can produce on...

A manufacturing company wishes to estimate the number of items that its workforce can produce on average each hour now that they have a new machine. The factory manager examined the records for a random sample of 10 hours over the past month. The hourly production rates for those 10 hours were:

145

172

154

160

149

158

191

162

163

158

Use this information to estimate a 90% confidence interval for the average number of items produced per hour. State any assumption made in your calculation.

Math   Statistics-And-Probability   
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