Lists grades of 80 students obtained in the final exam of an elementary statistics class. The grades are scored out of 100 points and rounded to the nearest whole number. Grades of 80 Students Obtained in the Final Exam of an Elementary Statistics Class 58 55 31 61 77 66 76 58 68 38 44 49 54 41 29 81 90 45 70 40 61 51 48 67 88 67 36 69 71 57 52 58 51 63 92 57 83 86 71 47 64 43 31 78 57 61 58 72 62 76 85 41 51 58 66 93 46 62 84 28 46 50 32 65 47 44 57 70 42 68 92 75 37 51 58 31 36 31 66 46 (a) Group the above data into a grouped frequency distribution. (b) What is the shape of the distribution? Do the observed scores tend to fall into some recognizable pattern? (c) What measures of central tendency would you compute? Justify your choices.?

Lists grades of 80 students obtained in the final exam of an elementary statistics class. The grades are scored out of 100 points and rounded to the nearest whole number. Grades of 80 Students Obtained in the Final Exam of an Elementary Statistics Class 58 55 31 61 77 66 76 58 68 38 44 49 54 41 29 81 90 45 70 40 61 51 48 67 88 67 36 69 71 57 52 58 51 63 92 57 83 86 71 47 64 43 31 78 57 61 58 72 62 76 85 41 51 58 66 93 46 62 84 28 46 50 32 65 47 44 57 70 42 68 92 75 37 51 58 31 36 31 66 46 (a) Group the above data into a grouped frequency distribution. (b) What is the shape of the distribution? Do the observed scores tend to fall into some recognizable pattern? (c) What measures of central tendency would you compute? Justify your choices.?

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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A group of 80 students took a statistics Exam in the following scores were recorded68 84 75 82 68 90 62 88 76 93 73 79 88 73 58 93 71 59 58 51 61 65 75 87 74 62 95 78 63 72 66 96 79 65 74 77 95 85 78 86 71 78 78 62 80 67 69 83 76 62 71 75 82 89 67 58 73 74 73 65 81 76 72 75 92 97 57 63 68 83 81 82 53 85 94 52 78 88 77 71 Calculate median exam score
Here is a set of sample data. 76 77 55 35 58 6 25 37 38 85 45 54 98 78 84 31 93 15 88 52 83 7 90 71 60 66 14 17 Base on the data above, identify the 5 number summary
In order to compare two statistics textbooks, Mr.Marin recommends one book to one class and another book to another class. At the end of the year the classes are each examined; the results out of 100 marks are detailed below.Textbook 144 52 95 76 13 94 83 72 55 81 22 25 64 72 35 48 56 59 84 98 84 21 35 69 28Textbook 265 72 48 63 68 59 68 62 75 79 81 72 39 55 58 52 82 79 55 64 53 58 59 64 66 68 42 37(i) Calculate the mean and standard deviation for each class. (ii) Which class performed better?(iii) Which class was more consistent? (iv) Compute the coefficient of variation for each class. Comment on the results.(v) Construct a stem and leaf for each class.(vi) Compute their lower quartile, upper quartile, interquartile range and median for each class.(vii) Using a graph paper, draw a box and whisker plot for each class. Showing all parameters. Commenting on the distribution of the data set. Hence indicate whether there are outliers.
Data was collected for 224 randomly selected 10 minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall were recorded. The data is summarized in the table below. Number of Guests Frequency 120 – 124 23 125 – 129 32 130 – 134 97 135 – 139 56 140 – 144 16 What is the class width for this GFDT?
The scores of 80 participants in a dart contest are: 58 49 48 61 68 71 42 36 62 50 82 76 61 50 82 60 36 80 70 52 60 72 58 70 35 55 66 47 84 55 32 46 68 70 62 58 48 75 49 67 48 53 55 57 60 82 40 69 54 63 66 70 72 68 42 55 36 46 59 50 78 67 39 68 72 48 72 56 70 66 70 55 46 72 68 88 54 39 40 56 (a) Find the mean score of the data above. (b) Construct a Stem-and-Leaf chart for the data above. (c) Find the mode of the scores. (d) Find the median of the scores.
When a student performs poorly on a midterm exam, the student sometimes is convinced that their score is an anomaly and that they will do much better on the final exam. The data below show the midterm and final scores (out of 100 points) for eight students in an introductory statistics class. Student Midterm Final 1 70 88 2 58 52 3 85 84 4 82 74 5 70 80 40 36 7 85 48 8 85 96 a) Construct a scatterplot for the data. Describe the pattern that you see in the scatterplot. Are there any clusters or outliers? If so, how would you explain them? b) Calculate the regression line for predicting a student's score on the final exam based on the student's score on the midterm.
Pavan
The average weekly incomes, in £s, of 18 selected occupations in the United Kingdom were: 244, 146, 278, 396, 435, 641, 577, 122, 294 357, 802 730, 286, 484, 169,, 559, 208, 498 Draw a box plot to represent these incomes. - UB = - Highest = - Q1 = - Q2 = - Q3 = - Lowest = - LB = Calculate the mean weekly income and the standard deviation.
Consider the data below describing students' score in Mathematics at a school. 78 82 78 75 46 53 69 64 72 83 89 47 77 64 62 72 67 59 82 66 50 54 83 43 69 67 50 70 68 77 91 40 75 75 57 69 80 63 98 67 64 73 100 69 73 67 89 49 61 58 60 79 76 63 54 56 58 69 50 74 35 94 81 73 47 70 58 67 82 61 64 44 83 85 59 62 85 73 62 75 81 68 76 69 85 46 72 57 76 64 70 48 90 83 59 54 83 84 92 72 99 82 96 63 73 63 50 79 59 87 76 54 71 67 88 61 69 72 72 87 56 83 100 95 94 82 49 85 46 77 48 72 70 68 31 94 96 74 94 92 97 43 81 68 73 85 94 54 72 63 76 63 71 56 78 62 82 49 68 73 68 73 75 51 79 32 57 49 55 81 79 49 67 76 66 75 57 76 61 69 72 46 75 57 53 53 66 88 65 96 84 72 64 59 46 80 41 41 69 55 Using SPSS, 1) Arrange the data in a stem-and leaf plot. Then, determine whether the data is normally distributed or not? Justify your answers.
Please help with 1,2,3
Using the frequency distribution from scores on a statistics Exam taken by 80 students determine68 84 75 82 68 90 62 88 76 93 73 79 88 73 60 93 71 59 85 75 61 65/75 87 74 62 95 78 63 72 66 96 79 65 74 77 95 85 78 86 71 78 78 62 80 67 69 60 76 62 71 75 82 89 67 73 73 74 79 65 81 76 72 75 61 97 57 63 68 83 76 75 53 85 94 75 78 88 77 60 What is the 55th percentile score