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PSYCHO15rus [73]
3 years ago
5

I need help on these problems​

Mathematics
1 answer:
kompoz [17]3 years ago
8 0

Answer:

10. 3+b and 8(f+7)

11. 8d and 4+p=9

12. 4m-3 and r-2=8

13. 4(5+x) and (10)2

14. 12(r-7) and 9+k

Step-by-step explanation:

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A banks loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviati
Alona [7]

Answer:

2.87%

Step-by-step explanation:

We have the following information:

mean (m) = 200

standard deviation (sd) = 50

sample size = n = 40

the probability that their mean is above 21.5 is determined as follows:

P (x> 21.5) = P [(x - m) / (sd / n ^ (1/2))> (21.5 - 200) / (50/40 ^ (1/2))]

P (x> 21.5) = P (z> -22.57)

this value is very strange, therefore I suggest that it is not 21.5 but 215, therefore it would be:

P (x> 215) = P [(x - m) / (sd / n ^ (1/2))> (215 - 200) / (50/40 ^ (1/2))]

P (x> 215) = P (z> 1.897)

P (x> 215) = 1 - P (z <1.897)

We look for this value in the attached table of z and we have to:

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P (x> 215) =.0287

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3 years ago
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