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coldgirl [10]
2 years ago
9

For 113 consecutive days, a process engineer has measured the temperature of champagne bottles as they are made ready for servin

g. Each day, she took a sample of 9 bottles. The average across all 1017 bottles (113 days, 9 bottles per day) was 60 degrees Fahrenheit. The standard deviation across all bottles was 0.5 degrees. (Round your intermediate calculations and final answer to 4 decimal places.) When constructing an X-bar chart, what would be the upper control limit
Mathematics
1 answer:
RideAnS [48]2 years ago
4 0

Answer:

upper control limit UCL=7.1632

Concept :

UCL=\bar{\bar{x}}+A_2\bar{R}  where A_2=0.34

\bar{\bar{x}}=\frac{\bar{x}}{n}

S=\frac{\bar{R}}{d}\Rightarrow \bar{R}=S\times d where S=0.5, d=2.97

Given :

She took a sample of per day (n) is 9 bottles.

The standard deviation Sof all bottles is 0.5 degree.

Average across all 1017 bottles \bar{x}are 60 degree Fahrenheit.

To find :

The value of the upper control limit (UCL)

Explanation :

Here, firstly we find the value of \bar{\bar{x}} .

\because\bar{\bar{x}}=\frac{\bar{x}}{n}

\therefore \bar{\bar{x}}=\frac{60}{9}

\Rightarrow  \bar{\bar{x}}=6.66 and \bar{R}=S\times d

\Rightarrow \bar{R}=0.5\times2.97=1.48

\Rightarrow \bar{R}=1.48

Now, UCL=\bar{\bar{x}}+A_2\bar{R}

\Rightarrow UCL=6.66+0.34\times1.48

\Rightarrow UCL=6.66+0.5032

\Rightarrow UCL=7.1632 degrees.

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