Fruit Fly Lab Report

After leaving out the pheromone fly trap for about a week for fruit flies to come and eat the methyl eugenol, the traps were then collected and the number of fruits flies were counted. When comparing the original methyl eugenol (own group) and the eugenol control, the null hypothesis was that there is no significance or correlation between the amount of fruit flies collected with different amounts of methyl eugenol used in comparison to the eugenol control, which contained no methyl eugenol. The original group was group 2 with 0.5 mg of methyl eugenol added to the fly trap (located 2nd closest to the building) while the control group contained 50.0 mg of eugenol. To determine the significance between the original group and the eugenol control,

An alternative hypothesis was that there is a significant correlation between the amount of fruit flies collected with the 0.5 mg methyl eugenol and just the eugenol control. According to Table 3, the amount of fruit flies collect in the 0.50 mg of methyl eugenol was higher than that of the eugenol control (e.g. trap 1 had 39 flies in contrast to 50.0 in the control). After calculating the p values using the t-test, the data indicated that there was significant difference and the null hypothesis was rejected. A null hypothesis that was rejected indicated that the p-value was lower than 0.05 and the critical value (t-value) was above the indicated t-value. Although the p-value was higher than 0.05 with a value of 0.09, the critical value of 2.2 was above the value indicated by the degree of 4 which had a value of 2.132. This means that there was a significant difference/correlation between the amount of flies captured in the eugenol control and 0.50 mg of methyl eugenol

The alternative hypothesis of this data set was that as the amount of methyl eugenol added to the fly increased, so did the number of flies attracted. According to table 3, there was a huge difference of flies in trap 1 where the original group has a total of 39 flies in contrast to 1 fly in the comparison group. However, after comparing the two other traps, although there were more flies captured with 0.50 mg methyl eugenol, the difference was not that significant with a range of 6-7 flies difference in the traps. After calculating the t-test, there was a p-value of 0.3 which was above the indicated range of 0.05 and a critical value of 1.3 which was higher than the indicated value of 1.002 with a degree of freedom of 4. Although the p value was about 0.05, the calculated t value was above 1.002 (vs. 1.3) which could mean that the null hypothesis was rejected. This means that there was significant difference and that more methyl eugenol added to the trap resulted in attracting more fruit