The data below are the number of absences and the final grades Number of absences, x 2 5 8 6 11 4 17 10 7 Final Grade, y 90 78 72 74 63 84 47 68 74 OA -0.991 OB. -0.918 OC. -0.888 OD. -0.899

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Q: n₁ = 50, x₁ =35, and n₂ = 60, x₂ = 40 OA. 0.982 OB. 0.374 OC. 2.361 OD. 1.328

A: To find: Find the standardized test  statistics.

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A: From given data we have : sample size n=35 sample mean x¯ = 34.70 standard deviation σ = 4.85