## Question

# A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 11

A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 11 subjects had a mean wake time of 95.1 min and a standard deviation of 43.8 min. Assume that the 11 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments. Does the result indicate whether the treatment is effective?

Find the confidence interval estimate.

min min

## Step by Step Solution

There are 3 Steps involved in it

### Step: 1

To construct a 95 confidence interval for the standard deviation of a normally distributed population we use the chisquare distribution Here is the de...### Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

### Step: 2

### Step: 3

## Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started