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Suppose the manager of a shoe store wants to determine the current percentage of customers who are males. How many customers should the manager survey

Suppose the manager of a shoe store wants to determine the current percentage of customers who are males. How many customers should the manager survey in order to be 90% confident that the estimated (sample) proportion is within 6 percentage points of the true population proportion of customers who are males?

z0.10

z0.05

z0.04

z0.025

z0.01

z0.005

1.282

1.645

1.751

1.960

2.326

2.576

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