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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 4GP

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**Effectiveness of Blood-Pressure Drug Study**

The investigation aims to evaluate a blood-pressure drug's effectiveness. An experimenter reported an average reduction in systolic blood pressure of **65.7** for a sample size of **24** with a standard deviation of **21.8**. The objective is to estimate the drug's impact on lowering a typical patient's systolic blood pressure with a **90% confidence level**, assuming the data follows a normal distribution.

### Task

Provide your answer as a **tri-linear inequality** precise to three decimal places:

\[ \text{Enter your answer:} \ \_\_ < \mu < \_\_ \]

This format will help to determine the confidence interval for the reduction in systolic blood pressure.

Expert Solution

Step 1: Given that

Sample size n=24

Sample mean=65.7

Standard deviation=21.8

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