Compute Standard deviation from the following data60Marks1020304050No. of students201073812

Answered: . Compute Standard deviation from the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1.4 Which of the following statements is true? a. The sum of the deviations from the mean is always zero. b. The sum of the squared deviations from the mean is always zero. c. The standard deviation is always smaller than the variance. d. The distance between the first and third quartiles is twice the distance between the first and second quartiles. e. none of these
14. Find the standard deviation from the following data : 60 70 Age under No. of persons dying: 10 20 30 40 50 80 15 30 53 75 100 110 115 125 (B.Com. Bangalore Unto: B.Com., Madras Uniu, 2009; MBA, Pune Una, 201
11. Calculate Mean deviation and its coefficient from A.M. and Mode from the following data. 8 Values 4 10 12 14 16 2 1 3 6 4 3 1 Frequency
5. The following table shows the quiz sceres (out of 25 possible points) for a class of ten students. a. Find the mean quiz score and each person's z-score (rounded to twe decimal places). The standard deviation of the guiz seeres is 6.92. Verify this value. Decide if each quiz score is unusual er net. Quiz Score z-Score Unusual? 15 20 19 23 25 14 19 24 25 b. What was the highest z-score? What was the lowest z-score? Did either of these represent unusual scores? G. How high or lew would a quiz score have to be to be considered unusual fer this quiz? d. Write this range as an inequality:
8- The following table gives the selling prices in tens of thousands of dollars for 20 homes sold during past month. Find the range, variance and standard deviation 60.5 113.5 79 475.5 73 70 122.5 150 100 125.5 88 175.5 89 128 111.5 100 50 340.5 100 525
d) For the following data (80, 40, 62, 70, 30, 82), the standard deviation is 24 O 24.5 O 25 O 25.5 O none of all above O
13. A sample consists of the following n = 5 scores: 11 1 3 7 3 a. Compute the mean and standard deviation in the sample b. Find the z-scores for each score in the sample
C. Consider the following data. (Unless otherwise specified, numerical answers should be eirher correct to 3 significant figures.) 8. 29 14 23 17 5 32 12 16 6. 25 34 38 20 31 15 1. Find the standard deviation of the data. 2. a. Construct a frequency distribution table using the class interval 1- 10, 11 – 20, 21 – 30, and 31 - 40. b. Hence, find the standard deviation of the data.
1- If marks of 20 students in one class out of 100 were as the following (Screen shot of tables, figures, and Excel file are required): 62 95 47 57 29 45 74 51 39 70 54 43 73 35 54 20 85 49 a. Find the mean, median and standard deviation of these marks. b. Construct the frequency table using interval width of 10 marks. c. Create a histogram chart (Present data in a method that can be understood by a non- technical audience). d. Find the probability of each age interval and represent that using histogram (Present data in a method that can be understood by a non- technical audience). e. From the graph in part d, find the probability that student get a grade of 70 or less and show how you find that on the figure. 6532
Mr 8. The results for an IQ quiz taken by 8 students from Ze Class A and Class B are shown below. The fal maximum score for the quiz is 25. we Class A: 4, 6, 6, 7, 8, 10, 11, 12 Class B: 0, 1, 1, 2, 3, 14, 17, 25 (i) Calculate the mean and standard deviation for Class A and Class B. Show your working clearly.

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. Compute Standard deviation from the following data 60 Marks 10 20 30 40 50 No. of students 20 7 3. 8. 12