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Use the sample information x¯x¯ = 36, σ = 7, n = 20 to calculate the...

Use the sample information x¯x¯ = 36, σ = 7, n = 20 to calculate the following confidence intervals for μ assuming the sample is from a normal population.

(a) 90 percent confidence. (Round your answers to 4 decimal places.)
  
The 90% confidence interval is from  to

(b) 95 percent confidence. (Round your answers to 4 decimal places.)
  
The 95% confidence interval is from  to

(c) 99 percent confidence. (Round your answers to 4 decimal places.)
  
The 99% confidence interval is from  to

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Answer #1


The statistic software output for this problem is :

(a)

The 90% confidence interval is from 33.4254 to 38.5746

(b)

The 95% confidence interval is from 32.9322 to 39.0678

(c)

The 99% confidence interval is from 31.9682 to 40.0318

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