Answered: he time taken to complete a particular…

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

The time taken to complete a particular task is normally distributed with a standard deviation of 15 minutes. A random sample of 8 people is selected and they complete the task in the following times (in minutes):

123

We use a 5% level of significance to test the claim that the mean time for completion of the task is 1 hour and 20 minutes.

The null and alternate hypotheses are :
Which one from here is the value of the test statistic :

z = -1.67

t = -1.67

z = 1.67

t = 1.67
The p-value is

p-value > 0.05 or p-value < 0.05

Based on this evidence, what is the best conclusion

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 by step

Solved in 3 steps with 1 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.

Similar questions