Answered: A local retailer claims that the mean…

Name: A local retailer claims that the mean waiting time is less than 9 minu
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: A local retailer claims that the mean waiting time is less than 9 minutes . A random sample of waiting times has a mean of 7.4 minutes with a standard deviation of 2.1 minutes . At a=0.01, test the retailers claim. Assume the distribution is normall

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

Topic Video

Question

A local retailer claims that the mean waiting time is less than 9 minutes . A random sample of waiting times has a mean of 7.4 minutes with a standard deviation of 2.1 minutes . At a=0.01, test the retailers claim. Assume the distribution is normally distributed . Round the test statistic to the nearest thousandth.

A) State the apporpiate null and alternative hypotheses.

B) Indicate whether hypothesis is left, right, or two- tailed.

C) Compute the test statistic t0. Round to the nearest hundredth.

D) Draw the t- distribution with the area that represents the P-value shaded.

E) Determine and interpret the P-value. What is the conclusionofc the hypothesis test.

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

Trending now

This is a popular solution!

Step by step

Solved in 7 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Hypothesis Tests and Confidence Intervals for Means$

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.

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc