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oksano4ka [1.4K]
3 years ago
9

"(2bsqrt4) \sqrt{ - 1} " align="absmiddle" class="latex-formula">

Mathematics
1 answer:
morpeh [17]3 years ago
8 0
(2b^4)^(-1)=1/(2b^4)
 
^(-1) basically means reciprocal

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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
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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:

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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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6 0
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tan( θ ) - 1 = 0

θ = π/₄

tan( θ ) - √3 = 0


θ = π/₃


so θ = π/₄ and θ = π/₃
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