Show that the correlation coefficient is independent of the origin of reference and the units of measurement.
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- 1) Sketch scatter graphs to illustrate the following correlation coefficients, describe your graphs e.g. strong positive correlation etc. a. r= -1 b. r= 0 c. r= 0.8 d. r= -0.3 2) Explain how would use the coordinates from a scatter graph to find the equation of the line of the best fit. 3) To make predictions using the equation for a line of best fit you need to.........................................for one of the variables and rearrange to find the otherDetermines whether the correlation is positine, negutive or 2ero between the Variables: voriable 1: Number Of absences from particulas dass Variable 2: fihulized grade in the eluss. is it positive, Negutive or 2cr0?PLEASE SHOW YOUR WORK. I WANT TO BE ABLE TO DO THE PROBLEM MYSELF AND ROUND TO 3 DECIMALS in a study of the relationship between personality and humor appreciation, Mobbs et al. (2005) measured two dimensions of personality, neuroticism and extroversion, in 17 healthy volunteers, scores along the personality dimensions were based on a 60-item, self-report questionnaire. Why is the association between these two personality dimensions? Subject Extroversion Neuroticism 1 43 49 2 46 53 3 48 67 4 48 57 5 48 56 6 50 48 7 51 60 8 51 41 9 53 51 10 58 47 11 62 41 12 63 51 13 63 30 14 63 28 15 67 55 16 67 47 17 67 39 9. Carry out a formal t-test for the association between extroversion and neuroticism in personalities.xls. H0: The population correlation coefficient is 0. HA: The population correlation coefficient is not 0. What is the critical value of the t-statistic required to reject the null hypothesis at a confidence level of 0.05?
- The df for the correlation are based on the number of observations minus 2. a) True b) FalseGive the best description of the correlation between V and I, assuming that a random voltage (V) supplies a random current (I) through a constant resistive load. a. b. C. d. The correlation is positive. The correlation is negative. The correlation is equal to 1. The correlation is equal to -1.I need answer within 20 minutes please please with my best wishes
- The National Football League (NFL) records a variety of performance data for individuals and teams. To investigate the importance of passing on the percentage of games won by a team, the folloving data show the average number of passing yards per attempt (Yds/Att) and the percentage of games won (WinPct) for a random sample of 10 NFL teams for the 2011 season (NFL vwebsite). Team Yds/Att WinPct Arizona Cardinals 6.9 44 Atlanta Falcons 8.0 69 Carolina Panthers 5.3 19 Chicago Bears 8.3 75 Dallas Covboys 5.4 26 New England Patriots 7.1 54 Philadelphia Eagles 8.4 79 Seattle Seahavwks 8.4 80 St. Louis Rams 6.1 33 Tampa Bay Buccaneers 7.8 70 a. Choose the correct a scatter diagram with the number of passing yards per attempt on the horizontal axis and the percentage of games won on the vertical axis. A. В. Win Pct WinPct! 80- 80 70 70 60 60 50 50 40 40 30- 30 20 20 10- 10- 80- 80 70 70 60 60 50- 50 40 40 30 30 20 20 10- 10- 6. 8. 9. 8. Yds/Att Yds/Att b. What does the scatter diagram…A patient is classified as having gestational diabetes if their average glucose level is above 140 milligrams per deciliter (mg/dl) one hour after a sugary drink is ingested. Rebecca's doctor is concerned that she may suffer from gestational diabetes. There is variation both in the actual glucose level and in the blood test that measures the level. Rebecca's measured glucose level one hour after ingesting the sugary drink varies according to the Normal distribution with μ=140+5 mg/dl and σ=5+1 mg/dl. Using the Central Limit Theorem, determine the probability of Rebecca being diagnosed with gestational diabetes if her glucose level is measured: Once? n=5+2 times n=5+4 times Comment on the relationship between the probabilities observed in (a), (b), and (c). Explain, using concepts from lecture why this occurs and what it means in context.For each of the variables described below, indicate whether it is a quantitative or a categorical (qualitative) variable. Also, indicate the level of measurement for the variable: nominal, ordinal, interval, or ratio. Make sure your responses are the most specific possible. Variable Level of measurement Type of variable Nominal O Quantitative (a) End-of-year stock classification (high yield, medium yield, or low yield) Ordinal Interval O Categorical Ratio O Quantitative (b) Temperature (in degrees Fahrenheit) O Categorical O Quantitative Nominal Ordinal ○ Interval 00 00 Ratio Nominal Ordinal (c) Price (in dollars) of a shirt on the clearance rack O Categorical Interval Ratio
- What variable measures the association between two Quantitative variables (positive/negative and Strength of the relationship between them?Choose the value of the Pearson's Correlation Coefficient (r) that best describes the two plots. : 0.504, II: -0.232. 2) I: -0.904, II: 0.232. 3) I: 0.904, II: -0.232. 4) I: -0.232, II: 1.304. 5) I: 0.904, II: -0.632.The correlation between X and Y is r = 0.35. If we doublw each X value, decrease each Y by 0.20, and interchange the variables (put X on the Y-axis and vice versa), the new correlation is?
