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Chapter 6: Q.31 (page 357)

Better readers?(1.3) Did students have higher reading scores after participating in the chess program? Give appropriate statistical evidence to support your answer.

Short Answer

Expert verified

Yes, students are getting higher marks.

Step by step solution

01

Step 1: Given information

It is given in the question that,

The graphs and numerical summaries below provide information on the subjects’ pretest scores, posttest scores, and the difference (post – pre) between these two scores.

02

Explanation

The presented boxplots of Pre and Post are overlapping, and the difference between Post and Pre is decreasing below 0, implying that there is no increase in all students' scores after participating in the chess programmes.

It's also worth noting that the median and mean differences are not negative, implying that the scores have changed. As a result, it is possible to conclude that students' results improve after participating in chess programmes, however not for the majority of pupils.

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Most popular questions from this chapter

The mean of Tis

(a)110

(b)140

(c)180

(d)195

(e)250

To introduce her class to binomial distributions, Mrs. Desai gives a 10-item, multiple-choice quiz. The catch is, that students must simply guess an answer (A through E) for each question. Mrs. Desai uses her computer's random number generator to produce the answer key so that each possible answer has an equal chance to be chosen. Patti is one of the students in this class.

Let X=the number of Patti's correct guesses.

To get a passing score on the quiz, a student must guess correctly at least 6times. Would you be surprised if Patti earned a passing score? Compute an appropriate probability to support your answer.

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(a) mean 40; standard deviation 36.

(b) mean 40; standard deviation19.

(c) mean 40; standard deviation 6.

(d) mean 36; standard deviation6.

(e) mean 10; standard deviation 19.

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