Question

Find the margin of error for 1−α = 0.98, σ = 1.05, and n = 160?...

Find the margin of error for 1−α = 0.98, σ = 1.05, and n = 160?

a-0.193

b- 0.171

c-0.015

d- 0.013

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Solution :

Given that,


Population standard deviation =    = 1.05

Sample size = n =160

At 98% confidence level the z is ,

= 1 - 98% = 1 - 0.98 = 0.02

/ 2 = 0.02/ 2 = 0.01

Z/2 = Z0.01 = 2.326 ( Using z table    )

Margin of error = E = Z/2    * ( /n)

= 2.326 * ( 1.05/  160 )

=0.193

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