MATHEMATICS MIDDLE SCHOOL

For a population, N=13,000, μ=134, and σ=26. Find the z value for x¯=128.60 for n=64.

Answers

Answer 1
Answer:

Answer:

The z value is - 1.661538

Step-by-step explanation:

The rule of the z-score for the population is z = ( x¯ - μ)/(σ/√n)

∵ x¯ = 128.60

∵ μ = 134

∵ σ = 26

∵ n = 64

- Substitute all of these values in the rule above to find z

∵ z=((128.60-134))/((26)/(√(64)))

- Simplify up and down

∴  z=(-5.4)/((26)/(8))

∴  z=(-5.4)/(3.25)

∴ z = - 1.661538

The z value is - 1.661538

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Answers

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Hope i helped! 

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Answers

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Answers

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