Lab Exercise IC 3. The following data were collected during a drug trial testing
ID: 145573 • Letter: L
Question
Lab Exercise IC 3. The following data were collected during a drug trial testing antibiotics o resistant Stapvylococcus awrens aureus growth The Effect of Different e Eect of Different Dosages of Antibioties on S, aureus growth Perceat inhibition of S. (as compared to saline) DALFOPRISTI- Dosage (mg) DAPTOMYCIN 0.25 0.50 1.00 1.50 10 35 70 100 15 45 90 100 38 76 100 a. What is the dependent variable? b. If an experiment is done properly, a researcher can test different variables at the same time. What are the independent variables in this experiment? c. Are the independent variables quantitative? d. Are the independent variablescontinuous? e. What kind of graph would be best to use? Circle one below. BAR GRAPH LINE GRAPH f. Explain your graph choice. g. Use the TAILS checklist and graph the data on the following page. Title Axes Intervals Labels Scale LegendExplanation / Answer
A ). Dependent variable is the' percentage inhibition of methicillin resistant Staphylococcus aureus'.
A dependent variable in an experiment is the outcome of the experiment which is under study and it's variation being measured. A dependent variable changes it's value when the value of an independent variable is changed.
B). Independent variables are the 'type of drug' and 'drug dosage'.
An independent variable is under control in an experiment. That is, it is changed or it's value is changed to study the effects on the dependent variable.
C). 'Drug dosage' is quantitative variable because it's measured.
'Drug type' is qualitative or categorical.
D). Drug dosage is a continuous variable.
A continuous variable can have any value between it's minimum and maximum ( sometimes taken as infinity). Drug dosage can have any value.
Only quantitative variables can be continous or discrete. Hence drug type cannot be continuous.
E). Line graph
F). Because a continuous variable is involved. Also three variables are plotted better using line graph . And there is overlapping of data especially at 1.5mg dosage across all three drug types which can be confusing bin a bar graph.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.