Consider the probability distribution below. \[\begin{array} { c c } x & f ( x ) \\ 10 & .2 \\ 20 & .3 \\ 30 & .4 \\ 40 & .1 \end{array}\] The variance of x equals

A) 9.165 B) 84 C) 85 D) 93.33 A) 9.165 B) 84 C) 85 D) 93.33

Topic
Statistics
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Essentials of Statistics Study Set 2

Exam 5: Discrete Probability Distributions

Exam 1: Data and Statistics72 Questions

Exam 2: Descriptive Statistics: Tabulargraphical76 Questions

Exam 3: Descriptive Statistics: Numerical154 Questions

Exam 4: Introduction to Probability93 Questions

Exam 5: Discrete Probability Distributions81 Questions

Exam 6: Continuous Probability Distributions114 Questions

Exam 7: Sampling and Sampling Distributions103 Questions

Exam 8: Interval Estimation78 Questions

Exam 9: Hypothesis Tests94 Questions

Exam 10: Inference About Means and Proportions With Two Populations61 Questions

Exam 11: Inferences About Population Variances60 Questions

Exam 12: Comparing Multiple Proportions, Test of Independence and Goodness of Fit45 Questions

Exam 13: Experimental Design and Analysis of Variance67 Questions

Exam 14: Simple Linear Regression119 Questions

Exam 15: Multiple Regression113 Questions

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Consider the probability distribution below. x f(x) 10 .2 20 .3 30 .4 40 .1 The variance of x equals

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