Description

Saket Choudhary
BISC 104
Session 1
Scientific research probes deepest mysteries of universe
The Process

• Independent variable: Intentionally manipulated by experimenter
• Independent variable: Intentionally manipulated by experimenter
3/100
• Independent variable: Intentionally manipulated by experimenter
• Control variable: Could possible affect dependent variable, so should be kept constant
3/100

• Background Information
• Background Information
• Sample Size
• Background Information
• Sample Size
• Replication
• Background Information
• Sample Size
• Replication
• Statistical Analysis

• Hypothesis: If amount of sugar increases, bread rises higher
• Hypothesis: If amount of sugar increases, bread rises higher
• Independent Variable: Amount of sugar
• Hypothesis: If amount of sugar increases, bread rises higher
• Independent Variable: Amount of sugar
• Dependent Variable: Size of loaf
• Hypothesis: If amount of sugar increases, bread rises higher
• Independent Variable: Amount of sugar
• Dependent Variable: Size of loaf
• Control Variables: Water, salt, temperature, brand of ingredients
… Should remain constant
• Hypothesis: If amount of sugar increases, bread rises higher
• Independent Variable: Amount of sugar
• Dependent Variable: Size of loaf
• Control Variables: Water, salt, temperature, brand of ingredients
… Should remain constant
Amount of Sugar Size of bread
10g 600cm2
20g 700cm2
25g 710cm2
30g 715cm2
Analysis Table
Sample Size?
Variability?

• Hypothesis: Fertilizer X gives a better yield over fertilizer Y
• Hypothesis: Fertilizer X gives a better yield over fertilizer Y
• Independent Variable: Amount of fertilizers X,Y
• Hypothesis: Fertilizer X gives a better yield over fertilizer Y
• Independent Variable: Amount of fertilizers X,Y
• Dependent Variable: Yield [kg/tonnes..]
• Hypothesis: Fertilizer X gives a better yield over fertilizer Y
• Independent Variable: Amount of fertilizers X,Y
• Dependent Variable: Yield [kg/tonnes..]
• Control Variables: Watering frequency, temperature, weather conditions ….

• Split into 4 groups
• Split into 4 groups
• Come up with proposals that can be tested and involves watching people at USC
• Split into 4 groups
• Come up with proposals that can be tested and involves watching people at USC
• All groups vote to select the best proposal
• Split into 4 groups
• Come up with proposals that can be tested and involves watching people at USC
• All groups vote to select the best proposal
• Form groups of 2, decide a day/time to collect data
• Split into 4 groups
• Come up with proposals that can be tested and involves watching people at USC
• All groups vote to select the best proposal • Form groups of 2, decide a day/time to collect data
• Disperse!
• Split into 4 groups
• Come up with proposals that can be tested and involves watching people at USC
• All groups vote to select the best proposal • Form groups of 2, decide a day/time to collect data
• Disperse!
• Carry out your experiments, analyze your results.

Possible Analysis Table
Hypothesis: More females than males visit Sprinkles ATM
Time-Day # Males # Females
1215-1245–Th .. ..
1310-1340–W .. ..
Total .. ..
• Can you plot a trendline that gives you a better picture of how the numbers vary based on time
• Is it possible to explain the trend you see in the plots? The above two points are not a requirement for the report.
8/100
Saket Choudhary skchoudh@usc.edu
9/100