4.2 Types of Kur'tosis II. Solve the following problems: 5. Given the measurements: 20, 26, 40, 39, 25, 36, and 34; compute the: 5.1 range 5.2 mean absolute deviation 5.3 variance 5.4 standard deviation 5.5 coefficient of variation 6. Repeated sampling procedures were conducted to determine the number of defective bulbs manufactured by a certain company. From the sampling results, determine the spread of the bulbs produced from the average defective bulbs by means of standard deviation. Bulbs Produced No. of Defective Bulbs 100-119 48 120-139 30 140-159 42 160-179 15 180-199 20 200-219 10 1. Answer the following: 1. When do we use the measures of variability? 2. Differentiate the uses between: 2.1 standard deviation and variance 2.2 skewness and kurtosis 3. Why do we seldom use the mean or average deviation as a measure of dispersion? 7. The table shows the average monthly wage of 3 shoe factory workers with corresponding standard deviation. Determine which factory has the larger dispersion form the mean salary. Factory Mean S A 1,800 15 B 2,300 12 C 2,700 10 8. Workers A and B are assigned to the same job. Worker A can finish his job in 7 hours, with a standard deviation of 8. Worker B can finish the same job in 6.5 hours with a standard deviation of 10. Who is more consistent 9. A certain department store had the following daily number of RTW dresses sold during a 6- day period: 60, 75, 32, 67, 85, and 79. Find the deviation of the daily sales by using the mean absolute deviation.