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I just want to know how do I find the value of z? lestion 8 0.25 out of 0.25 points You are developing an X-bar

I just want to know how do I find the value of z?

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lestion 8 0.25 out of 0.25 points You are developing an "X-bar" chart based on sample means. You know the standard deviation of the sample means is 4, the desired confidence level is 99.7 percent, and the average of the sample means is 24. Which of the following is your UCL

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