Adolescents commit an average of μ = 40 errors before they complete a standard test of their verbal skills. The distribution of error scores is approximately normal with a standard deviation of σ = 8. A researcher is testing the effect of a new method of teaching that increases the verbal skills of adolescents. A typical junior high school student is selected and given the verbal skills tutorial teaching. The student then finishes the verbal skill test with a total of X = 24 errors. What is the probability that an adolescent (without the verbal skills training) would score less than or equal to X = 24 errors? (use 4 decimal places)

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.