Question: The 15 plants in the control plot have mean yield 8.2 and sample variance of 8.2. Compare with the results in Exercise 19. Consider again

The 15 plants in the control plot have mean yield 8.2 and sample variance of 8.2. Compare with the results in Exercise 19.
Consider again the data in Exercises 17-20, but suppose that variances are unknown. Use the sample variance for the experimental population found in the earlier problem and the given sample variance for the control population to perform a t test on these unpaired populations.

Plant Weight Height Yield Number of seeds 11.83 7.65 14.57 14.97 46.2 10.11 9.29 414 12.26 6.61 14.26 38.5 9.51 8.34 39.8 13.35 7.04 37.9 12.90 34.8 10.35 9.84 39.4 18 40.8 16 17 11.26 11.08 40.7 21 5.44 20 10 11.82 43.1

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