A total of 112 candidates took a multiple-choice test that had 40 questions. The numbers of correct

Question:

A total of 112 candidates took a multiple-choice test that had 40 questions. The numbers of correct answers given by the candidates are shown in the following table.

a. State which class contains the lower quartile and which class contains the upper quartile. Hence, find the least possible value of the interquartile range.

b. Copy and complete the following table, which shows the numbers of incorrect answers given by the candidates in the test.

c. Calculate an estimate of the mean number of incorrectly answered questions.

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Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

ISBN: 9781108407304

1st Edition

Authors: Dean Chalmers, Julian Gilbey

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Question Posted: Sep 13, 2021 01:57 AM

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A total of 112 candidates took a multiple-choice test that had 40 questions. The numbers of correct

Question:

No. correct answers 0-9 10-15 16-25 26-30 31-39 40 No. candidates 18 orio 24 27 23 19 1

Step by Step Answer:

a To find the lower quartile Q1 and the upper quartile Q3 we need to calculate the cumulative frequencies and the quartile positions The cumulative fr...View the full answer

Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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