A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 118 students who averaged 39.4 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.7 minutes. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? distribution. b. With 95% confidence the population mean minutes of concentration is between and minutes. c. If many groups of 118 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean minutes of concentration and about percent will not contain the true population mean minutes of concentration.
A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 118 students who averaged 39.4 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.7 minutes. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? distribution. b. With 95% confidence the population mean minutes of concentration is between and minutes. c. If many groups of 118 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean minutes of concentration and about percent will not contain the true population mean minutes of concentration.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
Related questions
Question
Transcribed Image Text:A researcher is interested in finding a 95% confidence interval for the mean number of minutes students are concentrating on their professor during a one-hour statistics lecture. The study included 118 students who averaged 39.4 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.7 minutes. Round answers to 3 decimal places where possible.
a. To compute the confidence interval use a \( t \) distribution.
b. With 95% confidence, the population mean minutes of concentration is between \_\_\_\_ and \_\_\_\_ minutes.
c. If many groups of 118 randomly selected members are studied, then a different confidence interval would be produced from each group. About \_\_\_\_ percent of these confidence intervals will contain the true population mean minutes of concentration and about \_\_\_\_ percent will not contain the true population mean minutes of concentration.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 1 images
Recommended textbooks for you
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON