# Satistics - Probability - Hypothesis Testing

The Telecommunications industry achieved a more rapid increase in ROI during its initial 75 years in existence than the Oil & Gas industry achieved.

Which business sector, Oil & Gas or Telecommunications, achieved the greater ROI as their relative business sector matured?"

Assuming level of significance α= .05

3. Calculate test statistic.

4. Compute probability of test statistic.

5. Describe the results of your test.

[See the attached question file.]

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#### Solution Preview

The solution file is attached.

(1) H0: The Telecommunications industry achieved about the same or lesser ROI than the Oil & Gas sector,

that is 2 1

Ha: The Telecommunications industry achieved a greater ROI than the Oil & Gas sector, that is, 2 > 1

(2) Upper-tailed t- test for the difference in means of independent samples with = 0.05

Dof ...

#### Solution Summary

The expert examines hypothesis testing in probability statistics. Neat, step-by-step solution is provided.