Is X the discrete or continuous?
A discrete random variable X has a countable number of possible values. Example: Let X represent the sum of two dice. To graph the probability distribution of a discrete random variable, construct a probability histogram. A continuous random variable X takes all values in a given interval of numbers.
What is discrete random variables?
A discrete random variable has a countable number of possible values. The probability of each value of a discrete random variable is between 0 and 1, and the sum of all the probabilities is equal to 1. A continuous random variable takes on all the values in some interval of numbers.
Is number of chicken sold discrete or continuous?
Discrete random variables would usually come from counting, say, the number of chickens in a coop, the number of passing scores on an exam, or the number of voters who showed up to the polls. Between any two values of a continuous random variable, there are an infinite number of other valid values.
What is continuous random variable?
It is a function giving the probability that the random variable X is less than or equal to x, for every value x. For a discrete random variable, the cumulative distribution function is found by summing up the probabilities.
How do you tell if a random variable is discrete or continuous?
If a variable can take on any value between two specified values, it is called a continuous variable; otherwise, it is called a discrete variable. Some examples will clarify the difference between discrete and continuous variables.
How do you know if a data set is discrete or continuous?
Discrete data is a numerical type of data that includes whole, concrete numbers with specific and fixed data values determined by counting. Continuous data includes complex numbers and varying data values that are measured over a specific time interval.
What are the similarities of discrete and continuous?
Comparison Chart
| Basis for Comparison | Discrete Variable | Continuous Variable |
|---|---|---|
| Values | Values are obtained by counting. | Values are obtained by measuring. |
| Classification | Non-overlapping | Overlapping |
| Assumes | Distinct or separate values. | Any value between the two values. |
| Represented by | Isolated points | Connected points |
Is Money discrete or continuous?
A continuous distribution should have an infinite number of values between $0.00 and $0.01. Money does not have this property – there is always an indivisible unit of smallest currency. And as such, money is a discrete quantity.
Is blood type continuous or discrete?
Blood type is not a discrete random variable because it is categorical. Continuous random variables have numeric values that can be any number in an interval. For example, the (exact) weight of a person is a continuous random variable.
Is number of students discrete or continuous?
Discrete and Continuous Random Variables. The word discrete means countable. For example, the number of students in a class is countable, or discrete.
Is gender a discrete or continuous variable?
On purpose, I made it sound distinct that a variable is either discrete or continuous….Variable Reference Table : Few Examples.
| Variable | Variable Type | Variable Scale |
|---|---|---|
| Gender | Discrete | Categorical |
| Gender as Binary 1/0 Coding | Discrete | Categorical |
| True/False | Discrete | Categorical |
| Phone Number | Discrete | Nominal |
Is blood pressure a discrete or continuous variable?
2) Continuous Variables: These are sometimes called quantitative or measurement variables; they can take on any value within a range of plausible values. For example, total serum cholesterol level, height, weight and systolic blood pressure are examples of continuous variables.
Is heart rate a discrete or continuous variable?
Variables such as heart rate, platelet count and respiration rate are in fact discrete yet are considered continuous because of large number of possible values. Only those variables which can take a small number of values, say, less than 10, are generally considered discrete.
Is death a continuous variable?
For example, “male” or “female” are categorical discrete data values. Mortality (eg. 20 patients dead at 6 months) is an example of numerical discrete data values. Continuous data: when the variable is unrestricted and can have any value from a potentially infinite range, eg.
Can blood pressure be a discrete variable?
1 Answer. Blood pressure itself is continuous, but the measurement of it would appear to be discrete because of the limit on accuracy which can be recorded.
Is blood sugar level discrete or continuous?
For example, the concentration of glucose in the blood is a continuous quantity. Even if the instrument you are using rounds off values to whole numbers, these quantities are still continuous; ie, not countable.
Is systolic blood pressure a discrete variable?
Discrete or categorical variables are those which can only assume certain fixed or integer values. Discrete variables can be further divided into two categories: binary (or nominal) and ordinal. Age, heart rate, systolic blood pressure, and cardiac output are examples of continuous variables.