CHMTH2

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Liberty University *

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217

Subject

Statistics

Date

Feb 20, 2024

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docx

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Uploaded by gailh98

Question 1: What is the difference between mean and median? Answer 1: Mean is the average value of a set of numbers obtained by dividing the sum of all the numbers by the total number of values. Median, on the other hand, is the middle value in a set of numbers when they are arranged in ascending or descending order. Question 2: What is the formula for calculating the standard deviation? Answer 2: The formula for calculating the standard deviation is: s = √ [ Σ ( xi - x )2 / ( n - 1 ) ] where s is the standard deviation, xi is each individual value, x is the mean of all the values, and n is the total number of values. Question 3: What is a P-value in statistics? Answer 3: A P-value is a measure of the evidence against a null hypothesis. It represents the probability of obtaining an observed result, assuming that the null hypothesis is true. A low P- value (typically less than 0.05) indicates strong evidence against the null hypothesis, while a high P-value suggests that the null hypothesis cannot be rejected. Question 4: What is the difference between correlation and regression? Answer 4: Correlation is a measure of the strength and direction of the linear relationship between two variables. Regression, on the other hand, is a statistical method used to examine the relationship between a dependent variable and one or more independent variables. While correlation simply describes the relationship between variables, regression can be used to predict the value of the dependent variable based on the values of the independent variables.

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