Program into a second semester japanese language

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program into a second-semester Japanese language course in an effortto improve students’ Japanese reading comprehension (Reading in aForeign Language, April, 2004).The professors collected 266 booksoriginally written for Japanese children and required their students toread at least 40 of them as part of the grade in the course. The bookswere categorized into reading levels (colour coded for easy selection)according to length and complexity. Fourteen students participated inthe program. The number of books actually read by each student andthe student’s grade in the course are listed in the table below.GradesABC53424040282122# of books39343420163024(a) Find the mean and standard deviation of the number of booksread by students who earned an A grade. Find thez-score for anA student who read 40 books. Interpret the result.
(b) Find the mean and standard deviation of the number of booksread by students who earned either a B or a C grade. Find the8
z-score for a B or C student who read 40 books.Interpret theresult.
(c) Refer to parts (a) and (b). Which of the two groups of studentsis more likely to have read 40 books? Explain.
(2.192)Estimating the age of glacial drifts.Tills are glacial drifts con-sisting of a mixture of clay, sand, gravel, and boulders. Engineers fromthe University of Washington’s Department of Earth and Space Sci-ences studied the chemical makeup of buried tills in order to estimatethe age of the glacial drifts in Wisconsin (American Journal of Sci-ence, January, 2005).The ratio of the elements aluminum (AI) andberyllium (Be) in sediment is related to the duration of burial.TheAI–Be ratios for a sample of 26 buried till specimens are given in theaccompanying table and saved in theTILLfile.9

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Term
Summer
Professor
Dr.JoseCorrea
Tags
Statistics, Standard Deviation, REM, current stage, previous stage, dosage group

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