The null hypothesis is: there is no significant effect negative effect of increasing caffeine concentrations in nectar on the number of floral visits by bees.
If the number of floral visits by bees decreased with increasing nectar caffeine concentration, the null hypothesis is rejected. If there were no significant changes, the null hypothesis is not rejected.
<h3>What is a null hypothesis?</h3>
A null hypothesis a hypothesis which states that there is no significant difference between two populations or sample under study.
A null hypothesis can also state that there is no significant difference between variables in a study.
The experiment is to test potential negative effects of increasing caffeine concentrations in nectar on the number of floral visits by bees.
The null hypothesis is that there is no significant effect negative effect of increasing caffeine concentrations in nectar on the number of floral visits by bees.
The experiment will be designed as follows:
- Four potted plants with normal nectar caffeine concentration (serving as control), x2 nectar caffeine concentration, x3 nectar caffeine concentration, and x5 nectar caffeine concentration are obtained and kept in a garden.
- The number of floral visits by bees are recorded after 15 days.
If the number of floral visits by bees decreased with increasing nectar caffeine concentration, the null hypothesis is rejected. However, if there were no significant changes, the null hypothesis is not rejected.
In conclusion, a null hypothesis is a hypothesis of no significant difference.
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