19. The following table shows the monthly expenditures of 80 students of aUniversity on morning breakfast :Expenditure (in Rs.)Expenditure (in Rs.)530-570No. of StudentsNo. of Students780-82013730-770480-520680-7207.430-4707630-67012380-4204580-62018330-370Calculate arithmetic mean, standard deviation and coefficient of variation of the above data.

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Answered: ame. University on morning breakfast:…

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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The mean scores for students in a statistics course (by major) are shown below. What is the mean score for the class? 9 engineering majors: 90 5 math majors: 94 13 business majors: 76 The class's mean score is________ (Type an integer or a decimal rounded to two decimal places as needed.)
Q3/ A//Determine the mean by using short- 60 61 62 63 64 65 60 cut method Frequency 8 12 9 7 14 6. 8 B//Determine the Geometric Mean for the 20 35 60 75 90 15 10 |Frequency 4 3 3 2 6. data. 1
Example For 100 observations, the arithmetic mean and standard deviation are 8 and V10.5 · For 50 observations selected from these 100 observations, the mean and standard deviation are 10 and 2 respectively. Find the mean and standard deviation of the other half.
(c) Determine if the means of samples 1 and 2 overestimate, underestimate, or are equal to the population mean. The mean pulse rate of sample 1 the population mean. The mean pulse rate of sample 2 the population mean.
A researcher is measuring class as an income variable [not ideal, but...]. The variable is the amount of income a person makes in a given year. This measure is a _____________ scale.
The scatterplot below shows the mean cost of an oil change for Sadie's car during each of the last 10 years. Mean Cost of Oil Change Mean Cost (dollars) 000 25 A 20 B 15 Year Using the points (2, 15) and (7, 21), what is the best estimate of what the mean cost of an oil change willbe car for Sadie's car when it is 12 years old? 10 ➤X 0 1 2 3 4 5 6 7 8 9 10 Response 3* $25 III $27 C $29 40 $31 3 points
1 (Dot Diagram) The table shows the time taken, in minutes, for 12 employees of a company to travel from their homes to the office. ied ple of 'datum'. 20 22 21 21 18 18 TH sh 30 20 22 23 22 20 Fa V. (i) Represent the data on a dot diagram. (ii) Briefly describe the distribution of the data.
Time(min) # of students 10-19 8 20-29 15 30-39 22 40-49 18 50-59 12 60-69 9 70-79 5 Calculate the: a. Mean b. Median c. Mode
2. Using the frequency/percentage distribution table below to find the median, 12t percentile, 25th percentile (1" quartile), 75th percentile (3rd quartile) and inter-quartile range (1QR) for the variable "mumber of rooms in respondents' home or apartment." Write one sentence interpreting each statistics. Number of rooms Cumulative Frequency Percent Valid Percent Percent Valid 153 room 7 .8 .8 244 1.2 1.2 2.0 3 968 4.7 4.9 6.9 2507 12.1 12.8 19.7 3758 18.1 19.1 38.8 3972 19.1 20.2 59.1 2965 14.3 15.1 74.2 2186 10.5 11.1 85.3 1146 5.5 5.8 91.1 10 868 4.2 4.4 95.5 11 373 1.8 1.9 97.4 12 217 1.0 1.1 98.5 13 77 4 4 98.9 14 35 2 99.1 15 22 .1 .1 99.2 16 15 .1 .1 99.3 17 47 2 99.5 18 40 2 99.8 19 30 .1 99.9 20 9 .0 .0 99.9 21 5 100.0 22 .0 100.0 Total 19642 94.4 100.0 Missing N/A 1160 5.6 Total 20802 100.0
Question (2): (50%) An instructor has graded 19 exam papers submitted by students in a class of 20 students, and the mean (average) so far is 70. The maximum possible score is 100. Show your calculation steps for the questions below ac 2. ² 2. Can the last paper score increase the average by 2 points? Explain? 3. If the last paper receives 60, determine the new mean. 4. If the last paper receives 60, what is its deviation from total average? 5. If the highest grade is 95 and lowest grade is 20, what is the range of the grades?
The coefficient of variation for the male pulse rates is __ % The coefficient of variation for the female pulse rates is __%
The per capita energy consumption level (in kilowatt-hours) in a certain country for a recent year can be approximated by a normal distribution, as shown in the figure. H=2267 kWh VE o=574.7 kWh 2267 Kilowatt-hours 267 X 4267 (a) What consumption level represents the 6th percentile? (b) What consumption level represents the 17th percentile? (c) What consumption level represents the third quartile?

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