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N76 [4]
2 years ago
5

Help help help help help help help help help help help help help help help help help help​

Mathematics
1 answer:
kvv77 [185]2 years ago
5 0

Answer:

Step-by-step explanation:

Part 1

P(z < -1.45)

Using the z score table

P =

Part 2

We solve using z score formula

z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation.

a) P(X >52)

x = 52

Mean = 60

Standard deviation = 8

z = 52 - 60/8

z = -1

P-value from Z-Table:

P(x<52) = 0.15866

P(x>52) = 1 - P(x<52) = 0.84134

b) P(48 < x < 64)

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Step-by-step explanation:

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but here's the rest of it anyway:

                                                $210  =  15% of (March amount)

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