Answered: The waiting times (in minutes) of a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Concept explainers

Question

The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard deviation of 4.5 minutes. Construct a confidence interval for the population variance σ² and the population standard deviation σ. Use a 95% level of confidence. Assume the sample is from a normally distributed population. What is the confidence interval for the population variance σ²?

(__ , __) (Round to one decimal place as needed.)

Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice.

(Round to one decimal place as needed.)

What is the confidence interval for the population standard deviation σ?

(__ , __) (Round to one decimal place as needed.)

Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice.

(Round to one decimal place as needed.)

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Expert Solution

Step 1

Solution:

Given information:

n= 22 sample size

s= 4.5 Sample standard deviation

$α = 0.05$ Level of significance

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Point Estimation, Limit Theorems, Approximations, and Bounds$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions