Question

A customer service department asks its customers to rate their over-the-phone service on a scale of 1-20 immediately after their service has been completed. The company then matches each customer's rating with the number of minutes the person waited on hold. The following table shows the ratings and the number of minutes on hold for 10 randomly selected customers. Complete parts a and b. EEB Click the icon to view the data table 囲Click the icon to view the critical values for the Spearman rank-order correlation coefficient. Critical Values for the Spearman Rank-Order Correlation Coefficiem Data Table Critical Values for the Spearman Rank-Order 0.025 One-Tail o Two-Tail α 0.005 Rating Minutes 0.900 0.829 0.714 0.643 0.600 0.564 0.536 0.497 0.475 0.457 0.441 0.425 0.886 0.786 0.738 0.700 0.648 0.618 0.591 0.566 0.545 0.525 0.507 0.943 0.893 0.833 0.783 0.745 0.736 0.703 0.673 0.646 0.623 0.601 0.582 0.564 0.549 0.534 0.521 0.508 0.496 0.485 0.475 0.465 17 0.881 0.833 0.794 0.818 0.780 0.745 0.716 0.689 0.666 0.645 0.625 0.399 0.377 0.359 0.476 0.462 0.450 0.438 Print Done 0.591 0.576 0.562 0.549 0.537 0.526 0.515 0.505 0.496 0.487 0.478 20 24 0.343 0.336 0.329 0.323 0.317 0.409 26 0.385 0.448 0.440 0.432 Clear All Check Answer 30 0.305 0.364 a. Calculate the Spearman rank-order correlation coefficient. s-0.721 (Round to three decimal places as needed.) b. Using 0.01, perform a hypothesis test to determine if the population rank correlation coefficient is different than zero Identify the null and alternative hypotheses Type integers or decimals.) Determine the positive critical value for the Speaman rank-order correlation coefficient ,12 079i Round to three decimal places as needed.) Compare the correlation coefficient to the critical value Because s lsil t j the null nhypothesis State your conclusions. not equal to, zero. At the 1% significance level, it cannot be concluded that the population rank correlation coefficient is

Answer 1

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