A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13.1 years, and standard deviation of 2.2 years.If you randomly purchase one item, what is the probability it will last longer than 9 years?
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A: IntervalsFrequencyCumulative frequency0 - 420205 - 9153510 - 14316615 - 19228820 - 24109825 - 292100
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A:
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Q: (a) P(x≤39)= (Round to four decimal places as needed.)
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Q: The table below shows the RPI from 2009 until 2012 with two base years. The row Base 2000 shows the…
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A manufacturer knows that their items have a
If you randomly purchase one item, what is the
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