Mathematics, 18.12.2019 04:31 hdkdkdbx
Which of the following statements concerning the linear correlation coefficient are true? i: if the linear correlation coefficient for two variables is zero, then there is no relationship between the variables. ii: if the slope of the regression line is negative, then the linear correlation coefficient is negative. iii: the value of the linear correlation coefficient always lies between -1 and 1. iv: a linear correlation coefficient of 0.62 suggests a stronger linear relationship than a linear correlation coefficient of -0.82. a) ii and iii b) i and ii c) i and iv d) iii and iv given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. use a significance level of 0.05. r = 0.523, n = 25 a) critical values: r = plusminus 0.396, significant linear correlation b) critical values: r = plusminus 0.487, no significant linear correlation c) critical values: r = plusminus 0.396, no significant linear correlation d) critical values: r = plusminus 0.487, significant linear correlation write the word or phrase that best completes each statement or answers the question. construct a scatterplot for the given data. use the given data to find the equation of the regression line. round the final values to three significant digits, if necessary. managers rate employees according to job performance and attitude. the results for several randomly selected employees are given below.
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Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.
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Which of the following statements concerning the linear correlation coefficient are true? i: if th...
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