Discuss important measures of central tendency in detail.
[5 marks]Define Statistics. Also discuss the importance and limitations of Statistics.
[5 marks]Find mean, median, mode and range for the following data. 9,14,20,18,22,14,10,15,21
[5 marks]Draw frequency curve for the following frequency distribution. Class 20-30 30-40 40-50 50-60 60-70 70-80 80-90 Fi 9 14 21 26 18 12
[8 marks]Calculate Q1, D7 and P87 for the following data. 12,15,21,27,10,8,9,16,18,11,10
[5 marks]What is average? Give it’s uses and characteristics.
[5 marks]Calculate mean, median and mode for the following frequency distribution. Class 0-10 10-20 20-30 30-40 40-50 50-60 Fi 6 11 17 10 8
[3 marks]Define: Range, Quartile deviation, standard deviation, variance and coefficient of variance.
[5 marks]Find standard deviation and quartile deviation for the data 14, 8, 16, 7, 17, 6, 10, 15.
[5 marks]What is correlation? Discuss it’s types with example.
[5 marks]Find equation of regression line. X 10 7 15 16 11 14 9 Y 14 10 18 17 12 20
[12 marks]Write a note on Spearman’s rank correlation method.
[5 marks]Calculate co-efficient of correlation between variables Xand Y. X 12 18 20 10 15 16 Y 10 15 16 14 18
[20 marks]What do you mean by time series? Explain its important components.1
[5 marks]Find trends by 5 yearly moving averages. Year 2014 2015 2016 2017 2018 2019 2020 2021 Sales 34 25 27 40 45 54 50 47
[5 marks]Discuss the characteristics of a good sample.
[5 marks]Write a note on Systematic sampling method.
[5 marks]