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Q: What z score represents the 10th percentile?

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z = 1.281551

between 15 and 20.

You need to look up z-score tables.

The top percentile (> 99.86%)

88.49% 430-400 =30 30/25 = 1.2 Z score pf 1.2 = .8849

Related questions

2.326

z = 1.281551

To find what z-score represents the 80th percentile, simply solve for 0.8 = F(z), where F(x) is the standard normal cumulative distribution function. Solving gives us: z = 0.842

between 15 and 20.

Right around -1.28

77th percentile.

75th percentile.

z = -1.644853 (approx).

You need to look up z-score tables.

The top percentile (> 99.86%)

z = 0.5244, approx.

it doesn't exist.

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