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WGU Applied-Probability-and-Statistics Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Correlation & Regression | 20% | - Correlation coefficient and interpretation - Predictions and limitations of regression - Interpreting slope, intercept, and R-squared - Simple linear regression models |
| Inferential Statistics & Study Design | 20% | - Confidence intervals for means/proportions - Hypothesis testing framework and interpretation - Observational studies vs experiments - Sampling methods and bias |
| Probability Concepts | 20% | - Discrete and continuous probability distributions - Probability rules, independent and dependent events - Conditional probability and Venn diagrams - Normal distribution and empirical rule |
| Basic Numeracy & Algebra | 15% | - Exponents, roots, and basic formulas - Arithmetic operations, fractions, decimals, percentages - Linear equations, inequalities, graphing functions |
| Descriptive Statistics | 25% | - Measures of center: mean, median, mode - Measures of spread: range, IQR, variance, standard deviation - Graphical displays: histograms, boxplots, scatterplots - Types of data: categorical, discrete, continuous |
WGU Applied Probability and Statistics (FZO1 C955) Sample Questions:
1. Type II error occurs when:
A) Null rejected when true
B) Correct decision
C) Null accepted when false
D) Data error
2. In a game, a coin is tossed, and a spinner with 8 equal spaces numbered 1 through 8 is spun.
What is the probability of getting heads on the coin and a number less than 3 on the spinner?
A) 1/8
B) 3/8
C) 1/4
D) 1/2
3. The pie chart shows the contribution of different renewable energy sources to the total energy production.
What is true about the given data?
A) Hydropower and biomass together contribute more than solar energy to the total production.
B) Solar power contributes the most to the total production.
C) Geothermal contributes the least to the total production.
D) Biomass and geothermal together contribute more than wind energy to the total production.
4. Correlation coefficient r = #0.9 indicates:
A) Weak negative
B) Strong positive
C) No relationship
D) Strong negative linear relationship
5. A class of 25 students includes 10 who play soccer, 8 who play basketball, and 7 who play neither sport.
What is the probability of randomly selecting a student who does not play soccer?
A) .30
B) .40
C) .60
D) .50
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: A | Question # 3 Answer: B | Question # 4 Answer: D | Question # 5 Answer: C |
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