Compute probabilities - Study guides, Class notes & Summaries

BMAL 590 Quantitative Research Techniques Questions (solved to Pass). You take a random sample of 100 students at your university and find that their average GPA is 3.1. If you use this information to help you estimate the average GPA for all students at your university, then you are doing what branch of statistics? Descriptive statistics Inferential statistics Sample statistics Population statistics -A company has developed a new computer sound card whose average lifetime is unknown. In order t...

QMB3200 Actual Exam Questions With Reviewed 100% Correct Detailed Answers Guaranteed Pass 1. The mean, median, and mode have the same value for which of the following probability distributions? a. normal b. exponential c. uniform d. Poisson - ANSWER A 2. Excel's __________ function can be used to compute the expected value of a discrete random variable. a. VAR b. MEDIAN c. SUMPRODUCT d. AVERAGE - ANSWER C 3. The variance is a weighted average of the...

Excel's __________ can be used to construct a cross tabulation. Answers: a. COUNTIF function b. SUM function c. PivotTable Report d. Chart Tools - ANSWERSC. PivotTable Report To construct a pie chart using Excel's Chart Tools, choose __________ as the chart type. Answers: a. line b. column c. scatter d. pie - ANSWERSd. pie Excel's __________ function can be used to compute the sample covariance. Answers: a. COVARIANCE.S b. VAR c. CORREL d. MAX - ANSWERSa. COVARIA...

CPHRM Exam Guide Questions and CORRECT Answers Actuary - Correct ANSWER- a person who uses statistics to compute loss probabilities to establish premiums for insurance companies and self-insurance trusts. Advance directive - Correct ANSWER- lawful written instruction that describes an individual's preferences for health care should he or she become unable to express them later. Examples+ living wills, power of attorney for health care, advance health care directive. Adverse event - C...

Is a quantitative variable always measured in numbers? - ANSWER-Yes Is any measurement that you record from a sample a variable? - ANSWER-False What is a statistic? - ANSWER-The measure that is taken from the whole sample as a summary of the sample Sample data skewed to the left, then longer tail is at the... - ANSWER-Left What is sensitive to outliers? - ANSWER-Median Formula to calculate standard deviation - ANSWER-s = sqrt(sum(x1-xbar)^2 / n-1) How to calculate degrees of fr...

True/False: Probability Tables PT(X) do not always sum to one correct answers FALSE True/False: Conditional Probability Tables CPT(X|Y=y) always sum to one correct answers TRUE True/False: Conditional Probability Tables CPT(X|Y) always sum to one correct answers FALSE True/False: Marginal distribution can be computed from joint distributions correct answers TRUE True/False: Two random variables X,Y are independent, if and only if P(X,Y)=P(X)P(Y) correct answers TRUE True/False: A ...

ISDS Final Exam Questions With Correct Answers Probability is the a. number of successes divided by the standard deviation of the distribution. b. number of successes divided by the number of failures. c. numerical measure of the likelihood that an event will occur. d. chance that an event will not happen. - answernumerical measure of the likelihood that an event will occur. A __________ describes the range and relative likelihood of all possible values for a random variable. a. probab...

BMAL 590 Quantitative Research Techniques and Statistics Questions and Answers 100% Pass A company has developed a new computer sound card whose average lifetime is unknown. In order to estimate this average, 200 sound cards are randomly selected from a large production line and tested; their average lifetime is found to be 5 years. The five years represents a - Statistics A summary measure that is computed from a population is called a - Parameter Which of the following is a measure of t...

Addition law A probability law used to compute the probability of the union of two events. It is P(A ∩ B) = P(A) + P(B) − P(A ∪ B). For mutually exclusive events, P(A ∩ B) = 0; in this case the addition law reduces to P(A ∪ B) = P(A) + P(B). Basic requirements for assigning probabilities Bayes’ theorem A method used to compute posterior probabilities. Classical method A method of assigning probabilities that is appropriate when all the experimental o...