Asked by meeeeeee
Take a look at the statement below:
Fish meal is better than artificial fertilizers.
How could this statement be revised to make it a hypothesis?
Fish meal is safer than artificial fertilizers, but it does not make plants grow.
Fish meal is a better fertilizer than artificial fertilizer because fish meal is natural.
Plants that are fertilized with fish meal will grow taller than plants that receive artificial fertilizer.
Plants that receive artificial fertilizer will be better than plants that receive fish meal.
All Answers 1
Answered by
GPT-5 mini
AI
The best choice is:
- "Plants that are fertilized with fish meal will grow taller than plants that receive artificial fertilizer."
Why: it is specific, testable and falsifiable — it states a measurable relationship between a clearly defined independent variable (type of fertilizer) and dependent variable (plant height).
Why the others are not good hypotheses:
- "Fish meal is safer than artificial fertilizers, but it does not make plants grow." — two separate assertions (safety and growth) and partly vague; combine into separate, focused hypotheses if you want to test both.
- "Fish meal is a better fertilizer than artificial fertilizer because fish meal is natural." — appeals to “natural” as a justification; “better” and “natural” are vague and the causal explanation isn’t itself a testable mechanism.
- "Plants that receive artificial fertilizer will be better than plants that receive fish meal." — “better” is vague (better at what?); needs a clear, measurable outcome.
To make the chosen statement into a precise scientific hypothesis, specify organism, metric, timeframe and conditions. Example:
- Hypothesis (alternative): "Tomato seedlings fertilized with fish meal will have a greater mean height after 8 weeks than tomato seedlings fertilized with a standard NPK artificial fertilizer, under controlled greenhouse conditions."
- Null hypothesis: "There is no difference in mean height after 8 weeks between tomato seedlings fertilized with fish meal and those fertilized with the artificial fertilizer."
You can also decide whether to use a one-tailed (directional) test as above or a two-tailed test (simply “will differ”) depending on your experimental design.
- "Plants that are fertilized with fish meal will grow taller than plants that receive artificial fertilizer."
Why: it is specific, testable and falsifiable — it states a measurable relationship between a clearly defined independent variable (type of fertilizer) and dependent variable (plant height).
Why the others are not good hypotheses:
- "Fish meal is safer than artificial fertilizers, but it does not make plants grow." — two separate assertions (safety and growth) and partly vague; combine into separate, focused hypotheses if you want to test both.
- "Fish meal is a better fertilizer than artificial fertilizer because fish meal is natural." — appeals to “natural” as a justification; “better” and “natural” are vague and the causal explanation isn’t itself a testable mechanism.
- "Plants that receive artificial fertilizer will be better than plants that receive fish meal." — “better” is vague (better at what?); needs a clear, measurable outcome.
To make the chosen statement into a precise scientific hypothesis, specify organism, metric, timeframe and conditions. Example:
- Hypothesis (alternative): "Tomato seedlings fertilized with fish meal will have a greater mean height after 8 weeks than tomato seedlings fertilized with a standard NPK artificial fertilizer, under controlled greenhouse conditions."
- Null hypothesis: "There is no difference in mean height after 8 weeks between tomato seedlings fertilized with fish meal and those fertilized with the artificial fertilizer."
You can also decide whether to use a one-tailed (directional) test as above or a two-tailed test (simply “will differ”) depending on your experimental design.
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