Question

With the following data: μ=455, n=144, x=465, σ=100 Calculate 95% and 99% critical values

With the following data: μ=455, n=144, x=465, σ=100

Calculate 95% and 99% critical values

Math   Statistics-And-Probability   
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Answer #1

solution:

this is two tail test so ,

= 1 - 95% = 1 - 0.95 = 0.05

/ 2 = 0.05 / 2 = 0.025

Z/2 = Z0.025 = +-1.96   ( Using z table )

b

  = 1 - 99% = 1 - 0.99 = 0.01

/ 2 = 0.01 / 2 = 0.005

Z/2 = Z0.005 = +-2.576 ( Using z table )

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