Sa robot murder mystery solutions


Eliminate Mean Mrs. Median



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sa robot murder mystery solutions

Eliminate Mean Mrs. Median

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Case File #3

Oil – the density of oil is normally distributed, so we can use a Normal model, N(8.5, 2.5). We are looking for the complement of the probability that the density is between 3 and 11 mg of oil per cubic cm. This will be:

P(x ≤ 3) + P(x ≥ 11) = 1 – P(3 ≤ x ≤ 11) = 0.17256


Eliminate oil
Water – This is a binomial situation B(12, 0.2), but finding water in at least 4 of the 12 places means we use the complement rule: P(x ≥ 4) = 1 – P(x ≤ 3) = 1 – 0.7946 = 02054

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Case File #4

When subtracting in the order RR tracks – Riverwalk, resulting confidence interval is

Because 0 is not contained in the interval, there is a significant difference in the means.

Haunted RR tracks has

Riverwalk has



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