We carry out a chi-square test of independence, the chi-square statistic is based on (rxc) -1 degrees of freedom, where r and c denote, respectively, the number of rows and columns in the contingency table.

yes

step-by-step explanation:

maybe showing the graph would

step-by-step explanation:

-387129 iq

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

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x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x