1 12. The annual salaries of a group of employees are given in the tollowingtable:Salaries (in Rs. '000)45 50 55606570 7580Number of persons35 874.Calculate the standard deviation of the salaries.

Measures of dispersion is used to find the scatter ness. There are different measures of dispersion.…

Answered: 1 12. The annual salaries of a group of…

MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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b. The compensation received by the highest-paid executives of 12 international companies (in $'000) is as follows: 801 820 2215 803 850 856 899 846 902 856 911 947 i. Find the mean and the median compensation of the executives. Comment on the skewness of the distribution of the executives' compensations. 2
The following data show the interest rates on 4 randomly chosen personal loans (in percents): 6.6, 7.3, 13.7, 6. Calculate the standard deviation of the sample of interest rates. (please express your answer using 2 decimal places)
The number of hours worked (per week) by 400 statistics students are shown below in Table 1. Number of Hours Frequency 0 - 9 20 10 - 19 80 20 - 29 200 30 - 39 100 Refer to Table 1. ' 1. The class width for this distribution Group of answer choices is 39, which is: the largest value minus the smallest value or 39 - 0 = 39. is 10. is 9. varies from class to class. 2.The number of students working 19 hours or less Group of answer choices is 180. is 300. is 100. is 80. 3.The relative frequency of students working 9 hours or less Group of answer choices is 0.95. is 100. is 20. is 0.05.
16.
ANSWER ALL QUESTIONS, Table 1 Wages (RM) Number of employees, f 250.00 - 259.99 260.00 - 269.99 10 270.00 - 279.99 16 280.00 - 289.99 14 290.00 - 299.99 300.00 - 309.99 310.00 - 319.99 10 2 Total - 65 1. Based on the Table 1 above, calculate Mean (10 marks) (10 marks) a) b) Standard deviation
9
Suppose the following data show the introductory interest rates on a sample of 5 credit cards: 6, 2.7, 3.3, 5.6, 3.7. Calculate the standard deviation of the sample. Note: the numbers may be different from the last problem. (please express your answer using 2 decimal places)
6. The mean weight of 200 people is 67kg and the standard deviation is 7kg. Assuming thatthe weights are normally distributed, determine how many people have a weighta. between 60 and 74 kgb. more than 81 kgc. between 53 and 88 kg
The Truly Amazing Dudes are a group of comic acrobats. The weights (in pounds) of the ten acrobats are as follows. 146 192 174 177 159 87 178 152 144 148 (a) Find the mean and sample standard deviation of the weights. (Round your answers to one decimal place.) mean 155.7 lbs standard deviation ? lbs (b) What percent of the data lies within one standard deviation of the mean? %(c) What percent of the data lies within two standard deviations of the mean? %
Suppose that the speeds of car is traveling in California freeways are normally distributed with a mean of 63 mph. The highway patrols policy is to issue tickets for cars with speeds exceeding 80 mph. The records show that exactly 2% of the speed succeed this limit find the standard deviation of the speed of cars traveling on California’s freeway. Carry your intermediate computations to at least four decimal places in round your answer to at least one decimal place.
14. The mean IQ of 320 college students of a certain university is 100 with a standard deviation of 15. Assuming that IQ's are normally distributed; find the number of students with IQ • above 140 • below 80 • What percent of the cases cannot score above 110?
3. (a) In a distribution of 1200 values, the mean is 75 and the standard deviation is 12. Using Chebyshev's Theorem, at least how many values will be between 51 and 99?

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1 12. The annual salaries of a group of employees are given in the followin table: Salaries (in Rs. '000) : Number of persons 45 50 55 8 60 65 70 75 7 9 80 7 4. 3 Calculate the standard deviation of the salaries.