Neco 2020 Biology Question 5

Practice objective / multiple choice question 5 from the 2020 Neco Biology examination.

Neco 2020 Biology Objective / Multiple Choice Hard Difficulty
Question 5 NECO • 2020 • BIOLOGY • objective

An experiment compared the height of seedlings grown with (treatment) and without (control) a fertilizer. Eight seedlings were used in each group. The control group had mean height \(12.3\) cm with standard deviation \(1.2\) cm; the treatment group had mean height \(14.1\) cm with standard deviation \(1.5\) cm. Assuming equal variances, test at the 5 % significance level (two‑tailed) whether the fertilizer produces a significant increase in height. Also state the percent increase in mean height due to the fertilizer.

Answer Options

A. Difference is statistically significant (p < 0.05); mean height increased by about 12.0\\%.
B. Difference is statistically significant (p < 0.01); mean height increased by about 14.6\\%.
C. Difference is not statistically significant (p > 0.05); mean height increased by about 14.6\\%.
Correct Answer D. Difference is statistically significant (p < 0.05); mean height increased by about 14.6\%.
Correct Answer
D
Correct Option:
Difference is statistically significant (p < 0.05); mean height increased by about 14.6\%.

About This Question

This is Neco 2020 Biology Question 5. It is one of the objective questions from the 2020 Neco Biology examination.

Difficulty level: Hard .

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