Frequently Asked Questions (FAQ)

Here there are a couple of questions that people usually ask. If you have a question and you don't see the answer here, please contact us

  • It's been 20 hours already, and I still don't receive my solutions.


    The normal turnaround is 24 hours, so probably the solutions are on the way. Also it may be the case that a longer turnaournd was agreed, so in that case we'll usually take the agreed amount of time

  • My solutions don't show any equations, what's happening?.


    The equations written in word are created using MathType, and you shouldn't have a problem to see them. In case you have, please contact us and we can send you a pdf version that will show the equations for sure.

  • Some of the answers you guys sent were wrong..


    Ok, we usually deliver perfect answers. Rarely we'll hear from a client that an answer was wrong. From our experience, this usually happens when the client forgot to mention something we needed to know to solve the problem, or many times the problems were poorly written, giving rise to misinterpretation. Still, if it was our fault, we'll refund your money, no problem.

  • I love your work, guys, can you solve calculus problems for me?.


    We just do statistics. If you need help with other subjects, please go to Math Homework Help. They're really good (We are members of the same company)

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  • Probability
    • Basic Concepts: Sample Space, Events
    • Densities and Distributions
    • Normal Probability, z-scores
    • Binomial Distribution
    • Poisson Probability

  • Descriptive statistics
    • Descriptive Analysis of data
    • Graphs and charts
    • Histograms

  • Inferential Statistics
    • Means, variances, populations, samples
    • Confidence Intervals.
    • Z-test, T-test, F-tests and Chi-Square Tests
    • ANOVA, Factorial ANOVA, MANOVA
    • Linear and non-linear regression

  • Non-parametric Statistics
    • Sign Test
    • Wilkinson Tests
    • Kruskal-Wallis Test
    • Spearman Correlation Coefficient
    • Run Tests

  • Statistical Softwares
    • SPSS
    • Minitab
    • PHStat2
    • Excel
    • Matlab
    • Mathematica
    • R and S-Plus
    • Tree Plan
    • MegaStats
    • POM/QM
    • Stata

Some interesting Statistics resources