Answered: What is a correlation coefficient and…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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You are a data analyst for the MLB and your boss asks you to analyze data related to stadium attendance and winning percentage. You obtain data on 30 MLB teams (see the data file for this project; this data is from the early 2000’s, so the teams might not reflect the current state). The file includes the cost of the team name, league, year the park was built, stadium capacity, average attendance, and winning percentage. You decide to calculate the correlation coefficient to see if the winning percentage and average attendance are related, and then the least squares regression line, in order to predict the winning percentage of a team whose average attendance is 65000. What to do: Prepare your summary of results, and make sure you include (1) the correlation and (2) an equation for predicting the winning percentage based on average attendance. What is (3) the expected winning percentage of a team whose average attendance is 65000? Does this seem reasonable?
What is the null hypothesis of a test for correlation? There is correlation in the population. There is positive correlation in the population. There is no correlation in the population. There is negative correlation in the population.
1. Introduction to variability A researcher is studying psychological factors in artistic achievement among teenage girls. One variable he is particularly interested in is perseverance. What information does a measure of variability for the variable perseverance convey? Check all that apply. what is the most common value for the variable perseverance among teenage girls? What is the average value for the variable perseverance among teenage girls? What is the central tendency for the variable perseverance among teenage girls? How consistent are the values for perseverance among teenage girls?
According to Total Gross Sales, what movies if any, should be considered high-performance outliers? Explain how you arrived at your answer mathematically.Round any calculations/data to two decimal values. Compute descriptive statistics showing the relationship between total gross sales and each of the other variables. These need to include the covariance and correlation coefficient. Discuss the relationships Movie Title Opening Gross Sales ($ millions) Total Gross Sales ($ millions) Number of Theaters Weeks in Release Rogue One: A Star Wars Story 155.08 532.18 4,157 20 Lion 0.12 51.74 1,802 24 Fences 0.13 57.68 2,368 15 Patriots Day 0.16 31.89 3,120 11 Manchester by the Sea 0.26 47.70 1,213 23 Moonlight (2016) 0.40 27.85 1,564 28 Hidden Figures 0.52 169.61 3,416 46 Hell or High Water 0.62 27.01 1,505 14 La La Land 0.88 151.10 3,236 20 Florence Foster Jenkins 6.60 27.38 1,528 11 Collateral Beauty 7.10 31.02 3,028 8 Mother's Day 8.37 32.49 3,291 7 Bridget…
We calculate the central tendency and variability in order to provide a summary of a data set. Why is it important that we calculate both central tendency and variability?
What is meant by the statement, "Correlation does not imply causation"? Provide an example to illustrate your explanation.
How is correlation defined?
What is the relationship between covariance and the correlation coefficient?
When doing a correlational analysis, three possible results may occur. Define what does positive correlation, negative correlation and no relationship means.
Explain correlation and its importance.
A better explanation of ANOVA and correlation
True or false .If there is no linear correlation between enrollment and the number of burglaries , then those two variables are not related in anyway. Explain why ?

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What is a correlation coefficient and state and explain the meaning of negative values in the correlation coefficient in forecasting ?