Homework Help is Here – Start Your Trial Now!
Math
Statistics
2. Data science blogger Lucas Soares wrote a post in which he documented his goal of averaging less than 30 seconds to solve a 3x3x3 Rubik's cube. On June 2, 2020 he solved the cube 30 different times, averaging 29.04 seconds with a standard deviation of 3.41 seconds. Since cubes are randomly scrambled before each solve, we will consider this a random sample of all cubes he could have solved that day. Does his performance on June 2 provide significant evidence that u, his true average solving speed at that time, was less than 30 seconds? Conduct a test with a = .10 to determine your а. answer. b. Calculate and interpret a 90% confidence interval for u.

2. Data science blogger Lucas Soares wrote a post in which he documented his goal of averaging less than 30 seconds to solve a 3x3x3 Rubik's cube. On June 2, 2020 he solved the cube 30 different times, averaging 29.04 seconds with a standard deviation of 3.41 seconds. Since cubes are randomly scrambled before each solve, we will consider this a random sample of all cubes he could have solved that day. Does his performance on June 2 provide significant evidence that u, his true average solving speed at that time, was less than 30 seconds? Conduct a test with a = .10 to determine your а. answer. b. Calculate and interpret a 90% confidence interval for u.

MATLAB: An Introduction with Applications
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
icon
Related questions
Question

Please show all work so I can understand! 

2. Data science blogger Lucas Soares wrote a post in which he documented his goal of averaging less than 30 seconds to solve a 3x3x3 Rubik's cube. On June 2, 2020 he solved the cube 30 different times, averaging 29.04 seconds with a standard deviation of 3.41 seconds. Since cubes are randomly scrambled before each solve, we will consider this a random sample of all cubes he could have solved that day. а. Does his performance on June 2 provide significant evidence that u, his true average solving speed at that time, was less than 30 seconds? Conduct a test with a = .10 to determine your answer. b. Calculate and interpret a 90% confidence interval for u.
Transcribed Image Text:2. Data science blogger Lucas Soares wrote a post in which he documented his goal of averaging less than 30 seconds to solve a 3x3x3 Rubik's cube. On June 2, 2020 he solved the cube 30 different times, averaging 29.04 seconds with a standard deviation of 3.41 seconds. Since cubes are randomly scrambled before each solve, we will consider this a random sample of all cubes he could have solved that day. а. Does his performance on June 2 provide significant evidence that u, his true average solving speed at that time, was less than 30 seconds? Conduct a test with a = .10 to determine your answer. b. Calculate and interpret a 90% confidence interval for u.
Based on your confidence interval in part b, you would have made a different conclusion about the hypotheses from part a than the test you conducted in part a (assuming you did everything correctly). In one or two sentences, explain the cause of these differing conclusions.
Transcribed Image Text:Based on your confidence interval in part b, you would have made a different conclusion about the hypotheses from part a than the test you conducted in part a (assuming you did everything correctly). In one or two sentences, explain the cause of these differing conclusions.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS