Suppose a reading between 30 and 40 is called very interesting from an archaeological point of view.

Suppose a reading between 30 and 40 is called €œvery interesting€ from an archaeological point of view. Let us say you take readings at n = 12 sites chosen at random. Let r be a binomial random variable that represents the number of €œvery interesting€ readings from these 12 sites.
(a) Let us call €œvery interesting€ a binomial success. Use Table A to find p, the probability of success on a single trial, where p = P(success) = P(30 ‰¤ x Magnetic Susceptibility Readings, centimeter-gram-second × 10ˆ’6

(b) What is the expected value m and standard deviation s for the random variable r?
(c) What is the probability that you will find at least one €œvery interesting€ reading in the 12 sites?
(d) What is the probability that you will find fewer than three €œvery interesting€ readings in the 12 sites?

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Comment "cool" neutral" warm" "very interesting" "hot spot Magnetic Number of Estimated SusceptibilityReadingsProbability 30 10 x<20 54 54/120=0.45 18 12 OEX 10 30/120- 025 20 Ex < 30 30 40 s X 18/20 = 0.15 12/120- 0.10 6/120 0.05 <40