Question

  WITH 80% CONFIDFENCE, FOR SAMPLE PROPORTION 0.56 AND SAMPLE SIZE 2.2, WHAT THE UPPER CONFIDENCE LIMIT WITH 2 DECIMAL PLACE? _________

Answer 1

Solution:

Given that,

n = 2.2

Point estimate = sample proportion

= 0.56

1 - = 0.44

Z = 0.84

Margin of error = E = Z *(( *(1 - ))/ n

= 0.84 * ((0.56 *0.44)/ 2.2)

= 0.18

Upper confidence limit = + E

= 0.56 +0.81 = 1.37

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