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the duration of the spark burn time (the duration of the spark) while firing. You test a random sample of 27 spark plugs and obtain

the duration of the "spark burn time" (the duration of the spark) while firing. You test a random sample of 27 spark plugs and obtain the data displayed in the following histogram. Frequency 3 970 980 Spark Time (microseconds) Q Use the histogram above to make the following calculations: Mean: Median: Variance: Standard Deviation: Submit

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