correlation 10. Calculate the coefficient of correlation for the following data:5001000 1500 2000 2500 30003500100200300400500600700y

Correlation coefficient quantifies the strength and direction of relationship between variable. The…

Answered: 10. Calculate the coefficient of…

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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Español An advertising firm wishes to demonstrate to potential clients the effectiveness of the advertising campaigns it has conducted. The firm is presenting data from 8 recent campaigns, with the data indicating a correlation between advertising and sales. In particular, r= 0.59 for the variables cost of advertising campaign and resulting percentage increase in sales for the 8 campaigns. Using this information, test for a significant linear relationship between these two variables by doing a hypothesis test regarding the population correlation coefficient p. (Assume that the two variables have a bivariate normal distribution.) Use the 0.05 level of significance, and perform a two-tailed test. Then complete the parts below. (If necessary, consult a list of formulas.) Aa (a) State the null hypothesis H and the alternative hypothesis H . Ho :0 H :0 D=0 OSO (b) Determine the type of test statistic to use. Choose one) ▼ O
CATEGORY Question 3 Match the description of paired characteristics in the answer bank to the most reasonable description of the correlation between them. Press on an item in the answer bank, then press on the box under the corresponding correlation description. To remove an item, you can press on the box and the trash can icon to the right of the item you want to remove.
Describe the correlation whether a strong, a weak, or no. X and Y have ______ correlation. What is the correlation value? =
Flying from Philly How strong is the relationship between air fare and distance traveled? The table gives the distance in miles ) from Philadelphia to 6 cities and the cost of the cheapest flight on a popular dis count airline in dollars )Calculate the correlation .
Graphical Analysis In Exercises 9-12, determine wheiher there is a perfect positive linear correlation, a strong positive linear correlation, a perfect negative linear correlation, a strong negative linear correlation, or no linear correlation between the variables
State the null and alternative hypotheses. Use subscripts 1 for patients who live (Status = 0) and 2 (Status 1) for patients who die. :: :: u :: :: p :: P1 : P2 :: p :: x1 :: x2 : P2 :: r .. : P1 Ho: vs Ha: Give the p-value. Enter the exact answer. p-value ::
Coefficient of Determination Using the heights and weights described in Exercise 1, the linear correlation coefficient r is 0.394. Find the value of the coefficient of determination. What practical information does the coefficient of determination provide?
The finding that "the longer a person smokes cigarettes, the shorter their life expectancy" is an example of: a negative correlation a positive correlation no correlation a spurious correlation
Correlation matrix: A data set includes weights of garbage discarded in one week from 62 different households. The paired weights of paper and glass were used to obtain the results shown to the right. Is there sufficient evidence to support the claim that there is a linear correlation between weights of discarded paper and glass? Use a significance level of a = 0.05. Variables Paper Glass Click here to view a table of critical values for the correlation coefficient. Paper 10.3830 Glass 0.3830 (Type integers or decimals. Do not round.) Identify the test statistic, r. =(Round to three decimal places as needed.) Identify the critical value(s). (Round to three decimal places as needed.) O A. There are two critical values at r= ± O B. There is one critical value at r= State the conclusion. Because the absolute value of the test statistic is less than or equal to the positive critical value, there is not sufficient evidence to support the claim that there is a linear correlation between the…
value of the linear correlation coefficient r.1) A college professor wants to see if there is a linear correlation between the number ofminutes that students study for an exam and the number of errors that each student madeon the exam.Study time in minutes| 90 100 130 150 180 200 220 300Number of errors on the exam 252820 201512 1310a) Find the correlation r between study time and the number of errors on an exam.b) Find critical values for r.c) Determine if there is significant linear correlation between study time and the number oferrors on an exam using a 0.05 significance level.d) Clearly state the conclusion.
Cumulative Exam Active TIME REM 02:5 The weight (in pounds) and height (in inches) for a child were measured every few months over a two-year Using technology, what is the correlation coefficient? -0.997 period. The results are given in the table. O0.503 Weight (x) 12 18 24 30 32 35 37 40 O 0.503 Height (y) 22 23 26 30 32 33 35 36 38 0.997
True or false

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10. Calculate the coefficient of correlation for the following data: 1000 1500 2000 2500 3000 500 500 3500 100 200 300 400 600 700