Question: Construct a 95% confidence intervalaround the population mean. Report the mar- gin of error, along with the upper and lowerbounds. Interpret the confidence intervalin the

  1. Construct a 95% confidence intervalaround the population mean. Report the mar- gin of error, along with the upper and lowerbounds. Interpret the confidence intervalin the context of thequestion.

ME=

Xupper =

Xlower =

  1. What is the effect on the width of the confidence intervalif wedecrease thesample size?
  2. A study wantsto determine if cell phone bills are higher than $100. Specify the null and alternative hypothesis for this particulartest.

H0:

Ha:

  1. Reporttheteststatistic andp-valuefromthistest and interpretthesevalues. Let

=.01. What is the result from the test?Explain.

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