data science
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Data science has many definitions depending on who is doing what. However, in simple terms, Data Science is a combination of skills, expertise, and acumen in Mathematics, Technology, and Business Strategy. To do well in Data Science, you need a combination of domain expertise, data engineering, scientific method, math, statistics, advanced computing, visualization, and a hacker mindset.

The following questions vary from easy to difficult in no particular order. Also, you will find the answer to each question in bolden and italicized text. If you find any issue with the questions or you have some questions and answers you want to suggest, you can contact me as you wish.

A Type I error occurs if you do which of the following?

  • fail to reject the null hypothesis when it is false.
  • reject the null hypothesis when it is true.

A Type II error occurs if you do which of the following?

  • fail to reject the null hypothesis when it is false.
  • reject the null hypothesis when it is true.

Alpha (α) is which of the following?

  • the probability that you correctly reject the null hypothesis.
  • the probability of committing a Type I error.

Power is which of the following?

  • the probability that you correctly reject the null hypothesis.
  • the probability of committing a Type I error.

Sample size influence refers to which of the following?

  • the effect of the number of trails on the p-value.
  • the difference between the observed statistics and the hypothesized value.

Effect size to which of the following?

  • the effect of the number of trails on the p-value.
  • the difference between the observed statistics and the hypothesized value.

In general, what information does a histogram depict?

  • the changes in an outcome measurement over time.
  • the number (or fraction) of obervations that falls within certain ranges of a particular outcome measurement.

True or False? By hunting for correlations in data samples, one can often find entirely spurios patterns.

  • true.
  • false.

True or False? Probability and statistics provide mathematical tools for estimating the likelihood of random events

  • True.
  • False.

The few questions and answers are just the start. More will be added.

Enjoy!

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Adesoji Adegbulu
I Add values, Develop things, Explore Ideas, Solve problems, Open doors, Join hands & Inspire excellence. || · adesojiadegbulu.com

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