A Researcher Wants to Determine the Efficacy of a Training

question 22

Multiple Choice

A researcher wants to determine the efficacy of a training program directed at improving concentration,focus,and memory on college students.She selects a random sample of 16 individuals and have them take an assessment initial test before the training program,then the individuals complete the training program,and at the end they take a final test that's comparable to the initial test.The results are shown in the following table: The analyst uses a Wilcoxon matched-pairs signed rank test with a 0.05 significance level.The appropriate decision is ______.

• A) fail to reject the null hypothesis that the before and after scores are different
• B) reject the null hypothesis that that the before and after scores are different
• C) fail to reject the null hypothesis that the before and after scores are not different
• D) reject the null hypothesis that the before and after scores are not different
• E) do nothing

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Definitions:

Chloroplasts

Organelles found in plant cells and some algae that conduct photosynthesis, converting light energy into sugar.

Photosynthesis

The process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water, producing oxygen as a byproduct.

Stroma

Region within a chloroplast that surrounds the grana; contains enzymes involved in the synthesis of carbohydrates during the Calvin cycle of photosynthesis.

Chloroplast

Membrane-bound organelle in algae and plants with chlorophyll-containing membranous thylakoids; where photosynthesis takes place.