# S1 Statistics

**S1 Statistics….30 CE hours….$63**

## Take this course and test to:

- certify that you qualify to take a full college statistics course.
- show that you have basic statistics skills.
- review your statistics skills.
- earn 30 CE continuing education hours for nurses and other professionals.
- use new skills in your profession.

**Now**

**Study the subject via a textbook, online Google searches or an open university course below.****Take the online open book test at the end of this page.****If you get 75 %, pay online $63 and print your certificate.**

**Course Description:** This course provides an introduction to selected important topics in statistical concepts and reasoning. It represents an introduction to the field and provides a survey of data and data types. Specific topics include tools for describing central tendency and variability in data; methods for performing inference on population means and proportions via sample data.

**Objectives: **

- Understand and give examples of different types of data.
- Calculate standard normal scores and resulting probabilities.
- Calculate and interpret confidence intervals for population means.
- Calculate the mean, median, mode, maximum, SD, variance, range, IQR, p, t-test, NOVA, Chi-Square, R, n, Bar-chart, Q1 of selected data.

**Course Format: **Online linked resources and lectures that you can use anytime 24/7. One multi-choice test.

**Course Developers and Instructors: **R. Klimes, PhD, MPH (John Hopkins U), author of articles on statistics, infection control and hygiene. Heather Hawkins, DMD (Nova Southeastern U), specialist in infection control and research.

**Course Time: **About thirty hours for online study, test taking with course evaluation feedback and certificate printing.

**Professor Rudolf Klimes, PhD, welcomes you to this online course. Keep going.**

*START the course here. TAKE the exam at the end. PAY after the exam.*

**Introduction**

When talking about statistics as mathematical operations, there are two basic divisions within the field: *descriptive *and *inferential*. Descriptive statistics uses graphical and numerical summaries to give a ‘picture’ of a data set. Inferential statistics, which use mathematical probabilities, make generalizations about a large group based on data collected from a small sample of that group. (Source: Dr. Fritz C. Kessler, Department of Geography, Frostburg State University. Original URL Read on the Internet Archive)

This course focuses on descriptive statistics, and on their use.

**Study Lessons**

Study the following lecture slides from John McGready and John Hopkins School of Public Health:

**Part 1: Describing Data**- What role does statistics have in public health?
- Types of data: continuous, binary, categorical, time-to event
- Continuous data: numerical summary measures
- Continuous data: visual summary measure
- Sample data versus population (process) level data

**Part 2: Describing Data Part II**- The normal distribution
- Means, variability, and the normal distribution
- Calculating normal (z) scores
- Means, variability and z-scores for non-normal distributions

**Part 3: Sampling Variability and Confidence Intervals**- Sampling distribution of a sample mean
- Variability in the sampling distribution
- Standard error of the mean
- Standard error vs. standard deviation
- Confidence intervals for the population mean μ
- Sampling distribution of a sample proportion
- Standard error for a proportion
- Confidence intervals for a proportion

**Part 4: An Introduction to Hypothesis Testing: The Paired t-Test**- Comparing two groups: the paired data situation
- Hypothesis testing: the null and alternative hypotheses
- Relationships between confidence intervals and hypothesis testing when comparing means
- p-values: definition, calculations, and more information

**Additional Study Resources**

**Explore and Review Textbooks:**

**Use A Statistical Calculator:**

**Explore This Practice Test**:

**Statistics Library and Resources:**

**R Stats: **

**Test**

**Course Test 6632:** Click here for the self-correcting test and online payment, and receive your certificate immediately online. Test requires 75% for a passing grade.