Neco 2018 Data Processing Question 2

Practice essay / theory question 2 from the 2018 Neco Data Processing examination. This question covers Data and Information Management, Grouped Data, Measures of Central Tendency .

Neco 2018 Data Processing Essay / Theory

Topics: Data and Information Management Grouped Data Measures of Central Tendency

Question 2 NECO • 2018 • DATA_PROCESSING • essay

The following are the ages (in years) of 20 employees in a company: 22, 27, 31, 35, 38, 40, 41, 42, 44, 45, 46, 48, 49, 51, 53, 55, 57, 60, 62, 65.

Question Parts

( a )

Construct a grouped frequency distribution with class interval 10 years (20‑29, 30‑39, 40‑49, 50‑59, 60‑69) and give the frequency for each class.

( b )

Using the grouped data, calculate the estimated mean age using the assumed mean method, taking the assumed mean as the midpoint of the third class (45 years).

( c )

Determine the cumulative frequency for each class and hence find the median age (use linear interpolation within the median class).

( d )

Based on the mean (46.5) and median (≈46.4) obtained, discuss the skewness of the age distribution.

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About This Question

This is Neco 2018 Data Processing Question 2. It is one of the essay questions from the 2018 Neco Data Processing examination.

The question covers Data and Information Management, Grouped Data, Measures of Central Tendency .

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