1. An investigation to determine the average number of red blood cells in people at different altitudes was conducted, and the results are shown in the table below. The scientist constantly used 10 healthy people who live permanently at each altitude.

\begin{tabular}{|l|l|}
\hline
Altitude [tex]$(m)$[/tex] & \begin{tabular}{l}
Average no. of red blood cells \\
(millions per [tex]$mm^3$[/tex])
\end{tabular} \\
\hline
0 & 4.8 \\
\hline
1000 & 5.2 \\
\hline
2000 & 5.9 \\
\hline
3000 & 6.4 \\
\hline
4000 & 7.5 \\
\hline
5000 & 8.0 \\
\hline
\end{tabular}

1.1. State:

a) The independent variable of this investigation

Question

06-08-2024
Biology

Answered

1. An investigation to determine the average number of red blood cells in people at different altitudes was conducted, and the results are shown in the table below. The scientist constantly used 10 healthy people who live permanently at each altitude.

\begin{tabular}{|l|l|}
\hline
Altitude [tex]$(m)$[/tex] & \begin{tabular}{l}
Average no. of red blood cells \\
(millions per [tex]$mm^3$[/tex])
\end{tabular} \\
\hline
0 & 4.8 \\
\hline
1000 & 5.2 \\
\hline
2000 & 5.9 \\
\hline
3000 & 6.4 \\
\hline
4000 & 7.5 \\
\hline
5000 & 8.0 \\
\hline
\end{tabular}

1.1. State:

a) The independent variable of this investigation

Answer :

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GinnyAnswer GinnyAnswer · Answer 1 · 2024-08-06T15:29:49-04:00

1.1. To identify the independent variable in an investigation, we should focus on the variable that is controlled or manipulated to observe its effect on another variable.

In this investigation, the factor being manipulated is altitude. The scientist measures the average number of red blood cells for people living at different altitudes. This implies that the values for altitude are set by the researcher to study the resulting changes in the average number of red blood cells.

Thus, the independent variable of this investigation is:

- Altitude (m)

The altitude, measured in meters, is the variable that is controlled during the experiment to observe its influence on the dependent variable, which in this case is the average number of red blood cells.