WGU Applied-Probability-and-Statistics퍼펙트덤프최신데모문제 - Applied-Probability-and-Statistics퍼펙트최신덤프문제

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WGU Applied-Probability-and-Statistics Exam Syllabus Topics:

SectionObjectives
Regression and Correlation- Relationship analysis
  • 1. Correlation coefficient interpretation
    • 2. Simple linear regression basics
      Statistical Inference- Estimation
      • 1. Confidence intervals for means and proportions
        - Hypothesis testing
        • 1. Null and alternative hypotheses
          • 2. t-tests and z-tests (basic application)
            Descriptive Statistics- Data visualization
            • 1. Box plots and interpretation
              • 2. Histograms and frequency distributions
                - Data summarization
                • 1. Measures of variability (range, variance, standard deviation)
                  • 2. Measures of central tendency (mean, median, mode)
                    Probability- Fundamental probability concepts
                    • 1. Conditional probability and independence
                      • 2. Events and sample spaces
                        - Probability rules
                        • 1. Addition and multiplication rules
                          • 2. Bayes’ theorem (introductory level)
                            Probability Distributions- Continuous distributions
                            • 1. Standard normal and z-scores
                              • 2. Normal distribution
                                - Discrete distributions
                                • 1. Poisson distribution (introductory use cases)
                                  • 2. Binomial distribution

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                                    Applied-Probability-and-Statistics퍼펙트 최신 덤프문제 - Applied-Probability-and-Statistics최신덤프

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                                    최신 Courses and Certificates Applied-Probability-and-Statistics 무료샘플문제 (Q69-Q74):

                                    질문 # 69
                                    Two dice rolled. Probability sum = 7?

                                    정답：C

                                    설명：
                                    When two standard six-sided dice are rolled, there are 6 × 6 = 36 equally likely ordered outcomes. To find the probability that the sum is 7, count all ordered pairs that produce 7. These are (1,6), (2,5), (3,4), (4,3), (5,2), and (6,1). There are 6 favorable outcomes. Therefore, the probability is 6/36, which simplifies to 1/6. Since the answer choices include both 6/36 and 1/6, the listed answer from the PDF uses the unsimplified equivalent form, 6/36. Option C, 5/36, omits one valid ordered pair. Option D, 1/12, is too small because it would represent only 3 favorable outcomes out of 36. This problem reinforces that dice outcomes are ordered when two dice are rolled, so (1,6) and (6,1) are counted separately. Study Guide references/topics: sample spaces, dice probability, favorable outcomes, theoretical probability.


                                    질문 # 70
                                    Correlation coefficient = #0.7. This indicates:

                                    정답：B

                                    설명：
                                    The correlation coefficient r measures the direction and strength of a linear relationship between two quantitative variables. Values of r range from #1 to 1. A negative value indicates that as one variable increases, the other variable tends to decrease. The value #0.7 is fairly close to #1, so it represents a strong negative linear relationship. It is not perfect, because perfect negative correlation would be r = #1, but it is clearly stronger than a weak association. Option B is incorrect because the sign is negative, not positive.
                                    Option C is incorrect because no linear relationship would be represented by a correlation near 0. Option D is incorrect both in direction and strength. A scatterplot with r = #0.7 would generally show points trending downward from left to right, with some scatter around the trend. Study Guide references/topics: correlation coefficient, negative association, linear relationships, scatterplot interpretation.


                                    질문 # 71
                                    Poisson mean = 4. Probability of exactly 2 events?