Question 9The candy produced by a company has a sugar level that is normally distributed with a mean of

16.8 grams and a standard deviation of 0.9 grams. The company takes readings of every 10th bar off the production line. The reading points are 17.3, 14.9, 18.8, 16.5, 16.1, 17.4, 19.4. Is the process in control or out of control and why?

A)It is in control as the data points more than 2 standard deviations from the mean are far apart

B)It is out of control as the values jump above and below the mean

C)It is in control as none of these data points is more than 3 standard deviations from the mean

D)It is out of control as two of these data points are more than 2 standard deviations from the mean

Question 10

The toasters produced by a company have a normally distributed life span with a mean of 5.8 years and a standard deviation of 0.9 years, what warranty should be provided so that the company is replacing at most 5% of their toasters sold?

A)5.9 years

B)4.3 years

C)7.3 years

D)4.6 years

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