Mathematics & statistics

What is a Confidence Interval?

Statisticians use a confidence interval to describe the amount of uncertainty associated with a sample estimate of a population parameter. How to Interpret Confidence Intervals Assume that a 90% certainty interim expresses that the populace mean is more prominent than 100 and under 200. How might you translate this announcement?  A few people think this […]

Mathematics & statistics

Learning Objectives

Use summation notation to express the sum of all numbers Use summation notation to express the sum of a subset of numbers Use summation notation to express the sum of squares If  we have a variable X that represents the weights (in grams) of 4 grapes. The data are shown in Table 1. Table 1. […]

Mathematics & statistics

Inferential Statistics

With inferential statistics, you are attempting to arrive at resolutions that reach out past the quick information alone. For example, we utilize statistics to attempt to surmise from the example information what the populace may think. Or on the other hand, we utilize  inferential statistics to make decisions of the likelihood that a watched distinction […]

Mathematics & statistics

Coefficient of Determination

A key output of the regression analysis is the coefficient determination (indicated by R2). This is interpreted as the proportions of the variance in the dependent variable which can be predicted by the independent variable. This coefficient of determination results from the square of the correlation (r) between the expected and actual y scores; thus, […]

Mathematics & statistics

Variance Calculator Instructions

This calculator computes the variance from a data set: To compute the difference from a lot of qualities, indicate whether the information is for a whole populace or from an example. Enter the watched qualities in the case above. Qualities must be numeric and might be isolated by commas, spaces or new-line. You may likewise […]

Mathematics & statistics

Bell Curve Definition

What Is a Bell Curve? A bell curve is the most common type of distribution for a variable and is thus considered to be a normal distribution. The term “bell curve” originates from the fact that the graph used to depict a normal distribution consists of a bell-shaped line. The highest point on the curve, […]

Mathematics & statistics

Big data analytics

Big data analytics is the use of advanced analytic techniques against very large, diverse data sets that include structured, semi-structured and unstructured data, from different sources, and in different sizes from terabytes to zettabytes. Big data is a term applied to data sets whose size or type is passed the capacity of customary social databases […]

Mathematics & statistics

Binomial Distribution Calculator

Binomial distributions have two choices – usually “success” or “failure” in an experiment. This binomial distribution calculator can help you solve bimomic problems using no tables or long equations. You will need to know a couple of key items to connect to the calculator and then you will be set! Probability(P) – percentage or decimal […]

Mathematics & statistics

Integer

An integer is a number that has no fractional part, and no digits after the decimal point. An integer can be positive, negative or zero. (Compare this to real numbers than can have digits after the point and can have fractional parts) Example integers: 12 , 34 , -4 , 0 The following are real […]

Mathematics & statistics

External Validity

External validity is related to generalizing. Outside Legitimacy  Outside legitimacy is identified with summing up. That is the significant thing you have to remember. Review that legitimacy alludes to the rough truth of suggestions, surmisings, or ends. In this way, outer legitimacy alludes to the rough truth of ends the include speculations. Put in progressively […]

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