Measures Of Dispersion Of A Grouped Frequency Distribution: • Range • Mean Deviation • Variance • Standard Deviation

CONTENT

• Range
• Mean Deviation
• Variance
• Standard Deviation

 MEASURES OF DISPERSION:  also known as measures of spread or variation describes how the data given in any distribution are spread about the ‘Mean’, or the overall spread of the data. These measures are the range, mean – deviation, standard deviation, variance, coefficient of variation, etc.

READING ASSIGNMENT

1. Fundamentals of Economics for SSS by R.A I. Ayanwuocha Page 97-101
   1. Comprehensive Economics for SSS by J.U Anyaele page 36 –38

GENERAL EVALUATION QUESTIONS

1. Give five reasons why government participates in business enterprises.
2. Define ageing population.
3. Explain the sources of finance available to a public limited liability business.
4. Explain any three weapons that can be used by a trade union during trade      dispute.
5. What is occupational mobility?

WEEKEND ASSIGNMET

1.         In a class of 5 students the following scores were obtained in a mathematics test 10,2,6,7,12. What is the median score (A) 2 (B) 4(C) 6 (D) 7

2.         Which measure of central tendency can be applied to find the highest goal scorer in a football match (A) mean (b) Mode (C) Median (D) range

3.         If the following scores 2, 4, 6, and 10 with frequencies 3,5,7, and 10 respectively makes up a distribution, then the  mean score is (A) 5.7 (B) 6.7 (C) 7.5 (D) 5.4

SECTION B

1. Give the definition of the mean deviation and the standard deviation

Explain the difference between continuous data and discrete data.