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A program is seeded with 30 faults. During testing, 21 faults are detected, 15 of which are seeded faults and 6 of which are indigenous faults. What is the Mill's estimate of the number of indigenous faults remaining undetected in the program?

Respuesta :

Answer:

Estimated number of indigenous faults remaining undetected is 6

Explanation:

The maximum likelihood estimate of indigenous faults is given by,

[tex]N_F=n_F\times \frac{N_S}{n_S}[/tex] here,

[tex]n_F[/tex] = the number of unseeded faults = 6

[tex]N_S[/tex] = number of seeded faults = 30

[tex]n_s[/tex] = number of seeded faults found = 15

So NF will be calculated as,

[tex]N_F=6\times \frac{30}{15}=12[/tex]

And the estimate of faults remaining is  [tex]N_F-n_F[/tex] = 12 - 6 = 6

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