rbo Test-Math Calculator Scientists use a measurement known as the Kp Index to r

Question

rbo Test-Math Calculator Scientists use a measurement known as the Kp Index to record solar flare occurrences in the Northern Hemisphere. The Kp Index measures the energy added to Earth's magnetic field from the sun on a scale of 0-9, with 1 representing a solar calm and 5 or more indicating a magnetic storm, or solar flare. The magnetic fluctuations are measured in three-hour intervals (12 am to 3 am, 3 am to 6 am, and so on) so that deviations can be factored in and accurate data can be presented. The bar graph below shows the measurements for a five day period in September Solar Flare Occurrences Sept 9 Sept 10 Sept 11 Sept 12 Each bar = 3 hours Sept 13

Explanation / Answer

total number od readings = 5*8 = 40 {5 days . each day 8 reading}

total number of reading with Kp >= 5

= 5 {see sept 11}

hence required probability = 5/40 = 1/8

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