# Estimating the confidence interval in the given case

Not what you're looking for?

The number of staff personnel needed to handle patients at a medical center is determined by the mean time that patients must wait before being attended to by a physician. For a random sample of 100 previously recorded emergencies, the sample mean waiting time was 72 minutes, with a standard deviation of 28 minutes.

a. what is a 50 percent confidence interval for the actual mean waiting time?

b. what is a 99 percent confidence interval for the actual mean waiting time?

##### Purchase this Solution

##### Solution Summary

Solution describes the steps to estimate the confidence interval for the actual mean.

##### Solution Preview

Please refer attached file for complete solution. Expressions typed with the help of equation writer are missing here.

a. What is a 50 percent confidence interval for the actual mean waiting time?

Sample mean=72 minutes

Sample standard deviation=s=28 minutes

Sample size=n= 100

Since sample size is greater than ...

###### Education

- BEng (Hons) , Birla Institute of Technology and Science, India
- MSc (Hons) , Birla Institute of Technology and Science, India

###### Recent Feedback

- "Thank you"
- "Really great step by step solution"
- "I had tried another service before Brain Mass and they pale in comparison. This was perfect."
- "Thanks Again! This is totally a great service!"
- "Thank you so much for your help!"

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.