Neco 2021 Data Processing Question 46

Practice objective / multiple choice question 46 from the 2021 Neco Data Processing examination.

Neco 2021 Data Processing Objective / Multiple Choice Medium Difficulty
Question 46 NECO • 2021 • DATA_PROCESSING • objective

A test was taken by 80 students. The frequency distribution of scores is given below:\n\nScore interval (marks) | Frequency\n0-9 | 5\n10-19 | 12\n20-29 | 18\n30-39 | 20\n40-49 | 15\n50-59 | 8\n60-69 | 2\n\n(a) Using the class mid-point method, determine the inter-quartile range \(IQR\) of the scores (give your answer to one decimal place).\n\n(b) The top 10\% of the students improve their scores by 5 marks each. Assuming each score can be represented by the class midpoint, calculate the new mean score of the whole class (give your answer to one decimal place).

Answer Options

A. IQR \approx 24.5 and new mean \approx 31.5
B. IQR \approx 20.5 and new mean \approx 31.0
C. IQR \approx 22.0 and new mean \approx 30.0
Correct Answer D. IQR \approx 22.0 and new mean \approx 32.5
Correct Answer
D
Correct Option:
IQR \approx 22.0 and new mean \approx 32.5

About This Question

This is Neco 2021 Data Processing Question 46. It is one of the objective questions from the 2021 Neco Data Processing examination.

Difficulty level: Medium .

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