Solution-Vocabulary scores of seventh grade students

Vocabulary scores of seventh grade students

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Reference no: EM131703446

The Normal distribution with mean μ

μ = 6.8 and standard deviation σ

σ = 1.6 is a good description of the Iowa Test vocabulary scores of seventh grade students in Gary, Indiana. This is a continuous probability model for the score of a randomly chosen student. Figure 3.1 (p. 68) pictures the density curve. Call the score of a randomly chosen student X for short.

Note: If necessary, use < = to represent ≤ and > = to represent ≥.

(a) Write the event "the student chosen has a score of 5.2 or lower" in terms of X.

(b) Find the probability of an event which represents "the student chosen has a score of 5.2 or lower".

Reference no: EM131703446

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Vocabulary scores of seventh grade students

Reference no: EM131703446

Reference no: EM131703446

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