Based on the information provided in the graph and the characteristics of the data, the following three statements can be drawn as valid conclusions:
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The difference between the chirp rates of the two species remains fairly constant across the range of temperatures tested.
This conclusion is drawn from observing that while both species have an increase in chirps per minute with rising temperature, the difference in chirp rates appears stable within the investigated temperature range. -
It is possible for a male snowy tree cricket and a male field cricket to sing with the same chirp rate, but only at different temperatures.
This is a valid conclusion since the graph shows that the chirp rates for each species can overlap at certain temperatures, which means there might be a specific temperature at which they both reach the same chirp rate. -
Crickets of these two species sing only at temperatures between 15 °C and 30 °C.
From the data presented, it is implied that the chirp rates for both species are only recorded and displayed for the range of 15 °C to 30 °C, suggesting that chirping activity may be limited to this temperature range.
The statement about the change in chirp rate being similar for the two species is not supported by the data, as the rate of increase in chirp rate differs between the species.