Table of contents
- 1. Intro to Stats and Collecting Data55m
- 2. Describing Data with Tables and Graphs1h 55m
- 3. Describing Data Numerically1h 45m
- 4. Probability2h 16m
- 5. Binomial Distribution & Discrete Random Variables2h 33m
- 6. Normal Distribution and Continuous Random Variables1h 38m
- 7. Sampling Distributions & Confidence Intervals: Mean1h 3m
- 8. Sampling Distributions & Confidence Intervals: Proportion1h 12m
- 9. Hypothesis Testing for One Sample1h 1m
- 10. Hypothesis Testing for Two Samples2h 8m
- 11. Correlation48m
- 12. Regression1h 4m
- 13. Chi-Square Tests & Goodness of Fit1h 20m
- 14. ANOVA1h 0m
4. Probability
Basic Concepts of Probability
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Given the data below, determine the probability that a person randomly selected from Group 1 will be wearing jeans.

A
0.37
B
0.48
C
0.52
D
0.63

1
Identify the total number of people in Group 1. This is the sum of people wearing jeans and not wearing jeans in Group 1.
From the table, note that the number of people wearing jeans in Group 1 is 68.
The number of people not wearing jeans in Group 1 is 63.
Calculate the total number of people in Group 1 by adding the number of people wearing jeans and not wearing jeans: 68 + 63.
Determine the probability that a person randomly selected from Group 1 is wearing jeans by dividing the number of people wearing jeans by the total number of people in Group 1. Use the formula: \( P(\text{Wearing Jeans}) = \frac{\text{Number of people wearing jeans}}{\text{Total number of people in Group 1}} \).
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