Calculating with Data

A researcher conducted three trials to measure the mass of dissolved solute in $100\text{ mL}$ of water at $25^\circ\text{C}$:

True or False: The average mass of dissolved solute across all three trials is $14.0\text{ g}$.

A microbiologist measured the bacterial growth rate (in $\text{cells/mL}\cdot\text{hr}$) of a newly isolated strain across three independent trials under four different incubator temperatures, as presented in the table below:

True or False: The mean growth rate at $35^\circ\text{C}$ exceeds the mean growth rate at $30^\circ\text{C}$ by more than $130\text{ cells/mL}\cdot\text{hr}$.

Soil ecologists evaluated nitrogen mineralization by measuring nitrate production rates (in $\text{mg/kg/day}$) across 4 depth zones in two distinct forest management plots (Plot X and Plot Y). The results are summarized in Table 1 below.

Based on Table 1, if a composite sample is created using equal masses of soil from all 4 depth zones (0–40 cm), by how much does the average nitrate production rate of Plot Y exceed the average nitrate production rate of Plot X?

Biochemists measured the rate of glucose consumption (in $\text{mM/min}$) by a newly isolated bacterial strain across 3 temperature treatments ($25^\circ\text{C}$, $35^\circ\text{C}$, and $45^\circ\text{C}$). Each temperature condition was evaluated in 3 separate trials. The results are recorded in the table below:

Based on the data provided, what is the average rate of glucose consumption, in $\text{mM/min}$, for the $35^\circ\text{C}$ treatment across the 3 trials?

A team of plant physiologists investigated the transpiration rate of four plant species (Species W, X, Y, and Z) under two distinct light conditions—Low Intensity ($150\text{ }\mu\text{mol/m}^2\text{/s}$) and High Intensity ($800\text{ }\mu\text{mol/m}^2\text{/s}$)—at a controlled temperature of $25^\circ\text{C}$. The measured rates are shown in the table below:

Based on the table, what was the average increase in transpiration rate (in $\text{mg H}_2\text{O/cm}^2\text{/hr}$) across all four plant species when light condition was increased from Low Intensity to High Intensity?

Astrophysicists measured the transit depth (percentage of starlight blocked) for four exoplanets orbiting a host star at two observation wavelengths ($0.5\ \mu\text{m}$ and $1.5\ \mu\text{m}$), as recorded in the table below:

True or False: The mean transit depth across all four exoplanets measured at $1.5\ \mu\text{m}$ is $0.4\%$ greater than the mean transit depth measured at $0.5\ \mu\text{m}$.

A team of marine biologists studied the acoustic activity of the snapping shrimp (*Alpheus heterochaelis*) under controlled laboratory conditions. They measured the average snap rate (in snaps per minute) across three water temperatures and two salinity levels ($30\text{ PSU}$ and $36\text{ PSU}$).

Based on Table 1, what was the average rate of increase in snap rate (in snaps/min per $1^\circ\text{C}$) for shrimp kept at a salinity of $36\text{ PSU}$ as the water temperature increased from $18^\circ\text{C}$ to $26^\circ\text{C}$?

A group of biochemical researchers measured the enzymatic breakdown rate of cellulose (in $\text{mg/L}\cdot\text{min}$) by three bacterial strains (Strain X, Strain Y, and Strain Z) across three different pH environments ($5.0$, $6.0$, and $7.0$) at a constant temperature of $37^\circ\text{C}$. The results are recorded in the table below:

True or False: The average enzymatic breakdown rate across all three pH environments for Strain Y is $5\text{ mg/L}\cdot\text{min}$ greater than the average breakdown rate for Strain X.

Bioacousticians measured the echolocation click rate (in clicks per minute, $\text{clicks/min}$) of a harbor porpoise at four different water depths across three 15-minute observation trials. The results are summarized in the table below:

Based on the table, what is the average echolocation click rate, in $\text{clicks/min}$, across all three trials at a depth of 30 m?

A team of oceanographers monitored sea surface temperatures (SST, in ${}^\circ\text{C}$) at three distinct coral reef monitoring stations ($S_1$, $S_2$, and $S_3$) during a 4-month summer observation period.

Based on Table 1, what is the difference between the average 4-month SST at Station $S_2$ and the average 4-month SST at Station $S_3$?

Plant physiologists measured the photosynthetic rate (in $\mu\text{mol CO}_2/\text{m}^2\cdot\text{s}$) of a C3 plant species exposed to three ambient temperature conditions ($20^\circ\text{C}$, $30^\circ\text{C}$, and $40^\circ\text{C}$) under constant saturating light intensity. The measured photosynthetic rates were $15.0\ \mu\text{mol CO}_2/\text{m}^2\cdot\text{s}$ at $20^\circ\text{C}$, $24.0\ \mu\text{mol CO}_2/\text{m}^2\cdot\text{s}$ at $30^\circ\text{C}$, and $9.0\ \mu\text{mol CO}_2/\text{m}^2\cdot\text{s}$ at $40^\circ\text{C}$.

Based on these data, is the following statement True or False?
"The mean photosynthetic rate of the plant across the three tested temperatures is $16.0\ \mu\text{mol CO}_2/\text{m}^2\cdot\text{s}$."