In a science experiment, what is a:
1. independent variable
2. dependent variable
4. manipulative variable
I need these answers ASAP!!! I just need to know like the definition or an example or something!!
an independant variabie is like this:
the x is not next to a number, so it is independant
an dependant vairiable is :
the x has a number next to it so it is dependant
SRY, THATS ALL I NO!!!!!
An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.
A dependent variable is the response or measure of results.
Extraneous variables — other than the independent variable — potentially can affect the dependent variable, so they must be controlled. If possible, you try to keep them constant between the experimental and control group.
The experimental group receives the independent variable.
The control group is similar to experimental, except it does not receive the independent variable. Extraneous variables are balanced between experimental and control groups
Types of experiments
1. Single blind gives the control group a placebo — a substance that has not real physical effect. Subjects don't know if they are in experimental or control group to reduce placebo effect.
2. Double blind keeps both subjects and experimenter ignorant of group setup. Distribution of independent variable and placebo controlled by third party. This controls for experimenter bias and self-fulfilling prophecy. This means that experimenters with particular expectations are likely to consciously or unconsciously to bias the experiment and influence it to conform to their expectations.
As an example, suppose you want to find out if fluorides reduce dental cavities. You would find two groups trying to control the extraneous variables. Extraneous variables are found by surveying previous research in the area. In this case, you would match the grous in terms of previous history of cavities, diet and dental hygiene habits including how they brush their teeth.
The experimental group would get toothpaste with the independent variable, the flouride, while the control group would not have the fluoride in their toothpaste.
The dependent variable would be the number of cavities after participating in the experiment for a time. The dependent variable indicates the results, but it is not the results. At the end of the experiment, both groups could have no change in cavities or one of the groups could have a greater reudction in cavities. (Of course, if the fluoride increased cavities, you wouldn't want to use it.) all of these varied results would be indicated in terms of the dependent variable.
If only the subjects do not know who is getting the flouride, it is a single blind experiment. If both the subjects and experimenter do not know, it it is a double blind.
I hope this helps. Thanks for asking.
What is a manipulative variable?
Answer this Question
biology can someone check
Identify each of the parentheses items as an independent or dependent variable. 1)The (number of red blood cells )independent in a mouse's blood at(different levels of iron) dependent in its diet. 20)The (amount of starch formed)dependent in a plant leaf
- asked by joy
- 1,305 views
3. Given a value for the input variable, x, and the output variable, y, calculate the constant of proportionality. x = 60 and y = 18 x = 2/2 5 and y = 7 1/2 show your work please and thank you
- asked by URGENT
- 1,024 views
This is a Independent and Dependent Variable questions. If leaf color change is related to temperature, then exposing plants to low temperatures will result in changes in leaf color.
- asked by Cheryl
- 1,920 views
1.Let 𝑋 and 𝑌 be two binomial random variables: a.If 𝑋 and 𝑌 are independent, then 𝑋+𝑌 is also a binomial random variable b.If 𝑋 and 𝑌 have the same parameters, 𝑛 and 𝑝 , then 𝑋+𝑌 is a binomial random variable c.If 𝑋
- asked by Raven
- 2,717 views
Which statements are true of functions? Check all that apply. All functions have a dependent variable. All functions have an independent variable. The range of a function includes its domain. A vertical line is an example of a functional relationship. A
- asked by Trinity
- 5,491 views
1. consider the relationship between the height of a tree and time. Time would be considered which of the following? a. function b. input function c. independent variable **** d. dependent variable 2. which of the following describes the relationship
- asked by panda
- 3,298 views
Model radioactive decay using the notation t = time (independent variable) r(t) = amount of particular radioactive isotope present at time t (dependent variable) -λ = decay rate (parameter) Note that the minus sign is used so that λ > 0 a) Using this
- asked by Quinn
- 3,423 views
water accounts for about 60% of a person's body weight. a. write an equation that represents the water y of a person who weights x pounds. identify the independent variable and the dependent variable. b. make an input-output table for the equation in part
- asked by Jacob
- 1,383 views
1.The ___ variable responds to the __ variable and goes on the Y-axis. dependent, independent independent, dependent control, constant constant, control 2.The ___ group does not receive the treatment. constant control independent dependent 3.Which of the
- asked by Helppppp
- 656 views
In the experiment water clock : what changes (independent variable) , how does it responds to the changes made(dependent variable), and what is being controlled (controlled variable). Pleas I really need this by today. And also my question for science fair
- asked by Daisy
- 574 views
For each of the following statements, state whether it is true (meaning, always true) or false (meaning, not always true): 1. Let X and Y be two binomial random variables. (a) If X and Y are independent, then X+Y is also a binomial random variable. (b) If
- asked by Muhammad
- 1,095 views
The joint PMF, pX,Y(x,y), of the random variables X and Y is given by the following table: (see: the science of uncertainty) 1. Find the value of the constant c. c = 0.03571428571428571428 2. Find pX(1). pX(1)= 1/2 3. Consider the random variable Z=X2Y3.
- asked by RVE
- 6,702 views
Background: a number, e.g. 2 , can be thought of as a trivial random variable that always takes the value 2 . Let x be a number. Let X be a random variable associated with some probabilistic experiment. a) Is it always true that X+x is a random variable?
- asked by Vince
- 1,755 views
Anger and Snap Judgments Read the article entitled “Anger Can Cause Snap Judgments” and answer the following questions. ANGER CAN CAUSE SNAP JUDGMENTS Anger can make a normally unbiased person act with prejudice, according to a forthcoming study in the
- asked by Lara
- 2,569 views
in a relationship between variables, what is the variable called that changes in response to another variable? a. function b. input function c. independent variable d. dependent variable
- asked by john
- 6,827 views
You will be designing and carrying out your own experiment to investigate the effect different forces have on an object’s motion. The experiment you design should test at least one of the forces that affect motion that you have learned about in this
- asked by Kitty Kat *^*
- 4,279 views
Find the equation of the tangent line to the graph of f(x) = 2x − 6/x + 1 at the point at which x = 0. (Let x be the independent variable and y be the dependent variable.) I got this question wrong. I thought the answer would be y=-4x-6 I followed the
- asked by Angelica
- 1,826 views
1.which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists study the
- asked by Charlie Shuler
- 6,226 views
Suppose you set a glass of water in direct sunlight for 2 h and measure its temperature every 10 min. What type of graph would you use to display your data? What would the dependent variable be? What would the independent variable be?
- asked by Jennifer
- 1,699 views
Tomato Plant Growth Marissa wanted to see how the amount of water given to tomato plants affected their growth. She had six tomato plants that she split into two groups of three. She watered each plant in group 1 with 300ml of distilled water per day.
- asked by ;>
- 1,337 views