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Mathematics, 21.11.2019 02:31 kyra737

According to benfordā€™s law the probability that the first digit of the amount of a randomly chosen invoice is a 1 or a 2 is 0.477. you examine 90 invoices from a vendor and find that 29 have first digits 1 or 2. if benfordā€™s law holds, the count of 1s and 2s will have the binomial distribution with n = 90 and p = 0.477. too few 1s and 2s suggests fraud. what is the approximate probability of 29 or fewer if the invoices follow benfordā€™s law? do you suspect that the invoice amounts are not genuine?

(a) 0.9855

(b) 0.0145

(c) 0.9984

(d) 0.0016

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