How do you weight variables in SPSS?
Weighting cases in SPSS works the same way for both situations. To turn on case weights, click Data > Weight Cases. To enable a weighting variable, click Weight cases by, then double-click on the name of the weighting variable in the left-hand column to move it to the Frequency Variable field. Click OK.
How do you calculate weighted mean in SPSS?
Regarding weighted means, in general, to weight cases click “Data” – “Weight cases” – select “Weight cases by” and then choose variable which contains weights. And to calculate means click “Analyze” – “Descriptive Statistics” – “Descriptives” and then select variables for analysis.
How do you assign a weight to a variable?
In order to make sure that you have a representative sample, you could add a little more “weight” to data from females. To calculate how much weight you need, divide the known population percentage by the percent in the sample. For this example: Known population females (51) / Sample Females (41) = 51/41 = 1.24.
What is the meaning of weighting?
A weighting is a value which is given to something according to how important or significant it is. A weighting is an advantage that a particular group of people receives in a system, especially an extra sum of money that people receive if they work in a city where the cost of living is very high.
What is weight in simple words?
The weight of an object (or the weight of an amount of matter) is the measure of the intensity of the force imposed on this object by the local gravitational field. Unfortunately the common terms used to describe the weight of an object are units of mass such as kilograms or pounds.
What is difference between mass and weight with example?
The difference between mass and weight is that mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass. Mass is the measure of the amount of matter in a body. Weight usually is denoted by W. Weight is mass multiplied by the acceleration of gravity (g).
Why kg is used for weight?
In other words, the weight(force) of one kg is equal to one kgf, or 9.8N. Since there is no practical easy way to measure mass, in everyday life we use the kilogram as a unit of weight assuming that the gravitational field is fairly constant around earth.
What is the mass and weight?
The mass of an object is a measure of the object’s inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.
Can a body have mass but no weight?
Weight: The weight of the body is the force exerted by the gravitational pull of the Earth. We know that the value of acceleration due to gravity is not constant. So, for a body to have no weight, the acceleration due gravity must be zero. Hence, it is possible that a body can have mass but no weight.
What is the similarity between mass and weight?
Answer. Mass is a measurement of theamount of matter something contains, while Weight is the measurement of the pull of gravity on an object. 2)Mass is measured by using a balance comparing a known amount of matterto an unknown amount of matter. Weight is measured on a scale.
Is weight equal to mass?
The weight of an object is the force of gravity on the object and may be defined as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton. Density is mass/volume.
What is the difference between mass and weight in tabular form?
Difference between Mass and Weight is Mass is a measure of Inertia and Weight is a measure of Force. Many often tend to use these two terms in the same manner. However, this is not correct at all….Difference between Mass and Weight.
| Basis of Comparison | Mass | Weight |
|---|---|---|
| Gravitational Effect | It can never be zero. | It can be zero when no gravity is acting on it. |
What are the similarities between mass and volume?
Mass and volume are two units used to measure objects. Mass is the amount of matter an object contains, while volume is how much space it takes up. Example: A bowling ball and a basketball are about the same volume as each other, but the bowling ball has much more mass.
What is the relationship between mass and volume called?
Density is calculated by the dividing the mass by the volume, so that density is measured as units of mass/volume, often g/mL. If both water samples are at the same temperature, their densities should be identical, regardless of the samples’ volume.
How do you get the mass and volume of an object?
ρ=mV where ρ is the density, m is the mass and V is the volume.
Are mass and volume directly proportional?
Note that density is directly proportional to the mass (or weight) and indirectly proportional to the volume: If volume stays the same as mass increases, the density will increase by the same factor. If volume stays the same as mass decreases, the density will decrease by the same factor.
Does mass increase as volume increases?
Volume and mass are two different and independent quantities. So, there will be no effect on the mass as volume increases. Density =mass / volume. Thus, mass will increase as volume increases.
Is the mass and volume of water the same?
Water molecules all have the same mass and size. No matter what size sample of water you measure, the relationship between the mass and volume will always be the same. Because D=m/v, the density is the same for any amount of water.
Does increasing volume increase mass?
You can’t increase the mass of something and keep the volume constant. Density is an intensive property and so does NOT depend on the size or mass of the sample. So to start off, density is defined as mass/volume.
Why does mass increase when volume increases?
As the volume of the material increases, the mass will also increase. The greater the volume of the object the greater the number of atoms present. This will result in the object having greater mass.
What happens to mass when you double the volume?
If a mass and volume is doubled, what happens to the density? It will stay the same because the 2 and 2 would cancel out and we’d get the same density as the orignal value. Hope that was clear!
How will volume affect the mass of the liquid?
The more volume the unknown liquid had, the larger the mass. Since the density stayed the same, and density is theproportional relationship between mass and volume (density = mass/volume), if the volume increased so would the mass and vice versa.
What volume would 90g occupy?
What volume would 90g occupy? V = 90g/Density = 90/2 = 45 cm^3.
Does volume change with shape?
Changing the shape does not change its mass or volume, so density remains the same.
What is the difference between density and volume?
Volume – How much space an object or substance takes up. Mass – Measurement of the amount of matter in an object or substance. Density – How much space an object or substance takes up (its volume) in relation to the amount of matter in that object or substance (its mass).