GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -The sample mean is a random variable; as such it is written ˉX, and ˉx stands for individual values it takes. As a random variable the sample mean has a probability distribution, a mean ˉX, and a standard deviation ˉX.
Detailed explanation-2: -(symbol: X̄, M) the arithmetic average (mean) of a set of scores from cases or observations in a subset drawn from a larger population.
Detailed explanation-3: -X bar, x̄ (or X̄) or X-bar may refer to: X-bar theory, a component of linguistic theory. Arithmetic mean, a commonly used type of average.
Detailed explanation-4: -Sample Mean Symbol and Definition The sample mean symbol is x̄, pronounced “x bar”. The sample mean is an average value found in a sample.
Detailed explanation-5: -(an upper case X with a line above it) or (lower case x with a line above it) denote “the mean of the X scores". Thus if the X scores are 2, 3 and 4, then X = (2+3+4)/3 = 3.0. If you have two sets of scores, one lot would be the X scores and the others would be the Y scores.