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CBIC Statistics Exam | Questions Solved with Verified Correct Answers | Latest Update
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CBIC Statistics Exam | Questions Solved with Verified Correct Answers | Latest Update
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CBIC Statistics Exam | Questions Solvedwith Verified Correct Answers | Latest
Update 2024-2025
Skewness - ANSWER The extent to which cases are clustered more at one or the other end of
the distribution of a quantitative variable rather than in a symmetric pattern around its center
Kurtosis - ANSWER Measure of the fatness of the tails of a probability distribution relative
to that of a normal distribution. Indicates likelihood of extreme outcomes.
How flat or peaked a curve
Mesokurtic - ANSWER normal distribution
Leptokuric - ANSWER More peaked than normal distribution (positive numbers)
(lepto klepto, skinny people steal)
Platykurtic - ANSWER A flatter curve (negative numbers)
, inferential statistics - ANSWER makes an assumption about a population based on a small
sample size and is used to show an association between cause and effect. ( ie: election polls,
medical testing, environmental monitoring)
Types of inferential statistics - ANSWER parametric and non-parametric
Parametric test - ANSWER Z test and Student's T test.
assume normal distribution of the parent or sample population. Most parametric
techniques require measurements on a continuous interval scale.
Nonparametric test - ANSWER data make no assumption about the distribution of
the population values. (infection, no infection)
Chi Square Test
Fisher's exact test - ANSWER used in place of the x2 when the sample size is less than 20 or
any one cell in the table is less than 5.
Level of Significance - ANSWER The probability value arbitrarily chosen by the researcher as the
desired level of probability at which one may feel secure in rejecting the null hypothesis.
Confidence Interval - ANSWER A sample is an estimate of the population mean. It is a point
estimate that may include some error. To compensate for this margin of error, a calculation
is performed to identify a range of possible values the pop. mean might take.
the range of values within which a population parameter is estimated to lie
to calculate a CI, the data must have a normal distribution.
statistical significance - ANSWER a statistical statement of how likely it is that an obtained
result occurred by chance
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