## Experimental Design B/C

dxu46
Exalted Member
Posts: 798
Joined: April 11th, 2017, 6:55 pm
Division: C
State: MO

### Re: Experimental Design B/C

It seems like sg2themax isn't posting so I'll post the first question.
```1. Define and list at least 3 measures of central tendency.
2. Define and list at least 3 measures of variation.```
1. Mean, median and mode
2. Variance, interquartile range and standard deviation
1. Define and list at least 3 measures of central tendency.
2. Define and list at least 3 measures of variation.

OrigamiPlanet
Member
Posts: 146
Joined: August 6th, 2017, 12:15 pm
Division: C
State: PA

### Re: Experimental Design B/C

1. Define and list at least 3 measures of central tendency.
2. Define and list at least 3 measures of variation.

Oh whoops, well mean is the average of all the data, median is the center of the data, and mode is the most common data point. Variance is the distance a point is from it's average value, standard deviation quantifies the separation, and interquartile range will catergorize the data into four different ranges.
```1. Give the general "formula" for writing a hypothesis.
2. What is a histogram? When should it be used?
3. Compare and contrast systematic and random errors.```
Div. C - Cumberland Valley High School

Events: Battle at Valley Forge/MC Barons
Codebusters (3/3); Dynamic Planet (3/1); Astronomy (-/2)

Substitute in Event
Geologic Mapping (-/2)

Email me for anything!

dxu46
Exalted Member
Posts: 798
Joined: April 11th, 2017, 6:55 pm
Division: C
State: MO

### Re: Experimental Design B/C

```1. Give the general "formula" for writing a hypothesis.
2. What is a histogram? When should it be used?
3. Compare and contrast systematic and random errors.```
```1. If I change the IV, then the DV will change because the rationale.
2. It is a graph used to show frequency of numerical values.  It should be used instead of a bar graph when the IVs are numbers but do not show change that would be better shown using a line graph.
3. A systematic error is due to one or more mistakes a tool has that makes the data inaccurate, but still would show trends, etc.  A random error is due to the limited precision of the experimenter and/or tool.  It is basically a systematic error in one data point.```

OrigamiPlanet
Member
Posts: 146
Joined: August 6th, 2017, 12:15 pm
Division: C
State: PA

### Re: Experimental Design B/C

```1. Give the general "formula" for writing a hypothesis.
2. What is a histogram? When should it be used?
3. Compare and contrast systematic and random errors.```
```1. If I change the IV, then the DV will change because the rationale.
2. It is a graph used to show frequency of numerical values.  It should be used instead of a bar graph when the IVs are numbers but do not show change that would be better shown using a line graph.
3. A systematic error is due to one or more mistakes a tool has that makes the data inaccurate, but still would show trends, etc.  A random error is due to the limited precision of the experimenter and/or tool.  It is basically a systematic error in one data point.```
Div. C - Cumberland Valley High School

Events: Battle at Valley Forge/MC Barons
Codebusters (3/3); Dynamic Planet (3/1); Astronomy (-/2)

Substitute in Event
Geologic Mapping (-/2)

Email me for anything!

dxu46
Exalted Member
Posts: 798
Joined: April 11th, 2017, 6:55 pm
Division: C
State: MO

### Re: Experimental Design B/C

`List two methods for making an Experimental Control and when they appropriate to use.`
Just confirmed: my topics for this year are the Statement of Problem, Hypothesis, Variables, Experimental Control, and Conclusion. Quite different from last year, which was Quantitative Data(table and graph), statistics, and Errors...crying inside

kate!
Member
Posts: 433
Joined: October 11th, 2017, 12:07 pm
Division: C
State: NY
Location: Ward Melville HS

### Re: Experimental Design B/C

`List two methods for making an Experimental Control and when they appropriate to use.`
Just confirmed: my topics for this year are the Statement of Problem, Hypothesis, Variables, Experimental Control, and Conclusion. Quite different from last year, which was Quantitative Data(table and graph), statistics, and Errors...crying inside
Reviving the forum yay
```idk if this is right but here goes
1) when your independent variable has values, (such as 2 marbles, 4 marbles, 6 marbles) the control would be zero (so, 0 marbles)
2) when your independent variable has levels, (such as paper towel, printer paper, plastic bag) the control would be the medium value (so,
the printer paper because it is medium thickness)```
Last year I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Now I know stuff about amphibians, reptiles, water, and more experiments, yay again!
I'm planning to learn stuff about oceanography, fossils, and more water, yay for the third time!

dxu46
Exalted Member
Posts: 798
Joined: April 11th, 2017, 6:55 pm
Division: C
State: MO

### Re: Experimental Design B/C

`List two methods for making an Experimental Control and when they appropriate to use.`
Just confirmed: my topics for this year are the Statement of Problem, Hypothesis, Variables, Experimental Control, and Conclusion. Quite different from last year, which was Quantitative Data(table and graph), statistics, and Errors...crying inside
Reviving the forum yay
```idk if this is right but here goes
1) when your independent variable has values, (such as 2 marbles, 4 marbles, 6 marbles) the control would be zero (so, 0 marbles)
2) when your independent variable has levels, (such as paper towel, printer paper, plastic bag) the control would be the medium value (so,
the printer paper because it is medium thickness)```
That works, but it isn't something that I would normally use. Your turn!

kate!
Member
Posts: 433
Joined: October 11th, 2017, 12:07 pm
Division: C
State: NY
Location: Ward Melville HS

### Re: Experimental Design B/C

Okay so I'm not exactly sure if these are good questions but here goes
```1. What are 3 examples of qualitative observations?
2. What would be the independent and dependent variables and hypothesis in this experiment? (topic: parachutes... yes I am aware this experiment already exists)
- plastic bag
- newspaper
- printer paper
- paper towel
- one small plastic cup
- string
- 10 marbles```
Last year I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Now I know stuff about amphibians, reptiles, water, and more experiments, yay again!
I'm planning to learn stuff about oceanography, fossils, and more water, yay for the third time!

dxu46
Exalted Member
Posts: 798
Joined: April 11th, 2017, 6:55 pm
Division: C
State: MO

### Re: Experimental Design B/C

Okay so I'm not exactly sure if these are good questions but here goes
```1. What are 3 examples of qualitative observations?
2. What would be the independent and dependent variables and hypothesis in this experiment? (topic: parachutes... yes I am aware this experiment already exists)
- plastic bag
- newspaper
- printer paper
- paper towel
- one small plastic cup
- string
- 10 marbles```
```1. In a thermal energy experiment...
- We noticed that the ice cube didn't melt parallel to the heat plate
- We noticed that the ice cube's temperature never exceeded 0 degrees Celsius
- We noticed that the heat plate didn't return to its temperature it was before we started the experiment
2. How does [b]the material of a parachute[/b] affect [b]the time it takes to fall to the ground from a fixed height[/b]?```

kate!
Member
Posts: 433
Joined: October 11th, 2017, 12:07 pm
Division: C
State: NY
Location: Ward Melville HS

### Re: Experimental Design B/C

Okay so I'm not exactly sure if these are good questions but here goes
```1. What are 3 examples of qualitative observations?
2. What would be the independent and dependent variables and hypothesis in this experiment? (topic: parachutes... yes I am aware this experiment already exists)
- plastic bag
- newspaper
- printer paper
- paper towel
- one small plastic cup
- string
- 10 marbles```
```1. In a thermal energy experiment...
- We noticed that the ice cube didn't melt parallel to the heat plate
- We noticed that the ice cube's temperature never exceeded 0 degrees Celsius
- We noticed that the heat plate didn't return to its temperature it was before we started the experiment
2. How does [b]the material of a parachute[/b] affect [b]the time it takes to fall to the ground from a fixed height[/b]?```