## Z-Table

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# Category: Mathematics

## Z-Table

## T-Table

## Hypothesis Testing Step-by-Step

## Simple 4 Step T Test

## IBM SPSS Software & Laerd Statistics

## Statistics Introduction

## Functions of Many Variables

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To conduct hypothesis testing: 1.Create null and alternative hypothesis 2.Calculate z or t test statistics 3.Get the critical value from z or t table 4.Compare calculated value from step 2 with critical value from step 3. 1. “The null hypothesis is denoted by H0, and the alternative hypothesis is denoted by H1.” (Mann, 2010, p.382) … Continue reading Hypothesis Testing Step-by-Step

The t-statistic was introduced in 1908 by William Sealy Gosset, a chemist working for the Guinness brewery in Dublin, Ireland. “Student” was his pen name. Gosset had been hired owing to Claude Guinness’s policy of recruiting the best graduates from Oxford and Cambridge to apply biochemistry and statistics to Guinness’s industrial processes. Gosset devised the t-test as an economical way to monitor the quality of stout. When given a t-test question, we must first find the following: … Continue reading Simple 4 Step T Test

The IBM SPSS software offers statistical analysis, a library of algorithms, text analysis, open-source extensibility, integration with big data and seamless deployment into applications. Its ease of use make IBM SPSS accessible to users with all skill levels and outfits projects of all sizes and complexity. While, Laerd statistics is perfect for SPSS users, whether … Continue reading IBM SPSS Software & Laerd Statistics

Statistics can refer to numerical facts or its field of study: a group of methods used to collect, analyse, present, and interpret data and to make decisions. Decisions made by using statistical methods are called educated guesses. Like other fields of study, statistics has two aspects: theoretical and applied. Firstly, theoretical statistics deals with the … Continue reading Statistics Introduction

Functions with more than one independent variable. y=f(x) => one independent variable. Not just price, but incomes, ect. are independent. z=f(x, y) Here, z = dependent, x & y = independent. Example: z=100-2x+5y z=3×2-9y z=e2x+3y Expediential fn. Example 1: z=150-2x-3y X-Intercept (z=0, y=0) 0= 150-2x-3(0) => x=150/2 =75 (75, 0, 0) Y-Intercept (x=0, z=0) 0= … Continue reading Functions of Many Variables