Refer to the table below. Groups of 50 house flies were kept in three chambers under the same conditions except for temperature.After 4 hours, the number of surviving flies in each chamber was counted and expressed as a percentage of the initial 50 flies.Which is the null hypothesis that would be developed when using statistics to analyze these results?
A) No fly can survive equally well at all temperatures.
B) Differences in genetic makeup can explain differences between individual flies in their ability to survive at extreme temperatures.
C) Temperature is not the only variable that can affect fly survival rate.
D) Some flies are more able to survive extremes in temperature than other flies.
E) Differences in percent survival at the different temperatures could be due to random variations in the samples.

Question

Refer to the table below.  Groups of 50 house flies were kept in three chambers under the same conditions except for temperature.After 4 hours, the number of surviving flies in each chamber was counted and expressed as a percentage of the initial 50 flies.Which is the null hypothesis that would be developed when using statistics to analyze these results?
A) No fly can survive equally well at all temperatures. 
B) Differences in genetic makeup can explain differences between individual flies in their ability to survive at extreme temperatures. 
C) Temperature is not the only variable that can affect fly survival rate. 
D) Some flies are more able to survive extremes in temperature than other flies. 
E) Differences in percent survival at the different temperatures could be due to random variations in the samples.

Quizplus · Accepted Answer

The null hypothesis should be a statement that assumes no difference or relationship between variables. In this case, we are comparing the survival rates of house flies at different temperatures. Therefore, the null hypothesis should assume that any differences in the percentage of surviving flies at different temperatures could be due to random variations in the samples rather than the effect of temperature. Option E fits this description, as it assumes that there are no true differences in survival rates at different temperatures and that any observed differences are simply due to chance. The other options either assume a difference or attempt to explain the cause of differences, which is not appropriate for a null hypothesis.

Refer to the Table Below