The following is a correlation matrix among family size X weekly grocery bill Y and income Z for a random sample of 50 families x. y. z x. 1.00. .60. .20 y. .60. 1.00 .30 z. .20. .30. 1.00 Which of the correlations are significant at the .05 alpha level? Calculate the partial correlation between family size and grocery bill holding income constant and then determine if this partial correlation is significant. Find the critical value using the table that is attached see the attached information

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