10、 连续数例 1:In an increasing sequence of 10 consecutive integers, the sum of the first 5 integers is 560. What is the sum of the last 5 integers in the sequence?(A) 585 (B) 580 (C )575 (D)570 (E) 565例 2:If n is an integer greater than 6, which of the following mus...
a = first term d = common difference between the terms n = number of terms arithmetic solved problems question 1: the sum of the two numbers is 50, and their difference is 30. find the numbers. solution: let the numbers be x and y. now, as per the given situation, x + y = 50...
Least squares techniques are used to partition the variance into random error, factor effects and interaction effects, with the goal of determining the influence that the factor or factors have on the variable. For example, a company that is testing a new fertilizer might use an ANOVA experiment...
Probability and Statistics>Sampling> What is a Sample? In statistics, you’ll be working with samples — a part of apopulation. For example, if you want to find out how much the average American earns, you aren’t going to want to survey everyone in the population (over 300 million peop...
X is a random variable E(X) = μ is the expected value (themean) of the random variable X and E(Y) = ν is theexpected value(the mean) of the random variable Y n = the number of items in the data set. Σsummation notation. ...
Cluster analysis is the grouping of objects based on their characteristics such that there is high intra-cluster similarity and low inter-cluster similarity.
What is the variance? States of the Economy: The economy can pass through different stages called economic states. These stages can range from an economic boom to a total depression. The state of the economy affects the expected return on most investments. Answer and Explanation: 1 Let, pi...
Regression Analysis: Analysis that models the link between two or more variables is known as regression. Regression analysis is widely used in predictive modeling to show how a dependent variable is related to one or more independent variables. Multivariate Statistical Analysis: In this type of Analy...
Predictive analytics is the art of using historical & current data to make projections about what might happen in the future. Learn more for your business.
What is its importance in statistics? Central Limit Theorem The Central Limit Theorem (CLT) is a cornerstone of probability and statistics. The theorem states that as the sample size increases, the mean distribution among several samples will resemble a Normal Distribution. When you don'...