Homework Answers
![> test_score c(93,77,67,72,52,83,66, 84,59,63,75,97,84,73, 81,42,61,51,91,87,34, 54,71,47,79,70,65,57,90,83,58,69, 82,76,71,60,38,81,74,69,68,76,85,58,45,73,75,42,93,65) > test score C(93,77,67,72,52,83,66,84,59,63,75,97,84,73, 81,42,61, 51,91,87, 34,54,71,47,79,70,65,57,90,83, 58,69, 82,76,71,60,38,81,74,69,68,76,85, 58,45,73,75,42,93,65) > #A Sample Mean > mean(test score) [1] 69. 32 > #B sample variance » var (test score) [1] 232. 6302 > #C interquartile Range > IQR = IQR (test-s core) > IQR [1] 21.75 > #mi drange > (min(test score) + max(test_score))/2 1] 65. 5 > #E Mode > getmode function (val) +unique-val unique(val) unique.val [which. max (tabulate(match(val,unique_val)))] i getnode (test score) 1] 93 #F Range [11 34 9](http://img.homeworklib.com/questions/4ba52740-41ae-11ea-9880-e583e7719c32.png?x-oss-process=image/resize,w_560)
![> #G Five number summar > summary (test score) Min. 1st Qu. Median Mean 3rd Qu. Max. 34. 00 59.25 71. 00 69. 32 81.00 97. 00 > #H Semi -Inter-quar s IQR/2 [1] 10.875 li > #1 30th percentile > quant i le (test score, . 30 30% 62.4 > #1 per centile of 71 > quantile(test_score, seq (O.4,o. 55.o. 01)) 40% 41% 42% 43% 44% 45% 46% 47% 48% 49% 50% 51% 69. 54 70. 03 70. 52 71.00 71.00 71.oo 67.60 68.-00 68. 58 69.00 69.00 69.05 69. 54 70.03 70. 52 71.00 71.00 71.00 52%1153% 54% 55% 71.48 71.97 72.46 72.95 > #49th percent ile for 71 value i> #Kstandard deviation sd(test score) [11 15.25222 , #LSkewd dataset | median(test [1] 71 - mean(test C11 69. 32 20 sc getmode (test-score [1] 93 equa mear #this sho quantile(rest score 60% 74.4](http://img.homeworklib.com/questions/4c61ccf0-41ae-11ea-a41b-7da61132cb7f.png?x-oss-process=image/resize,w_560)
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Given the following test scores on exam #1 for INEN 370 during the summer 2017: Due...
1. On the following page are the exam scores on the first Statistics test for all...
1. On the following page are the exam scores on the first Statistics test for all my classes. Using everything we covered in the first three chapters of our textbook, describe the data. I recommend going through your notes and textbook, chapter by chapter. Include as much as you can – type of data, frequency distribution, histogram, numerical methods, etc. The standard deviation for the data is 16.7. Exam Scores on the First Statistics Test 100 88 100 86 100...
3. For the Data sets in the test scores example, find the following a). The IQR,...
3. For the Data sets in the test scores example, find the following a). The IQR, compare the two interquartile ranges. b). Any Outliers in either set Minimum Q1 Median Q3 Maximum Day Night 32 25.5 55 76 73.5 81.5 82.5 87 99 97
(1 point) Here is a list of 20 scores on a Statistics midterm exam: 81,60, 98,95,...
(1 point) Here is a list of 20 scores on a Statistics midterm exam: 81,60, 98,95, 69, 88,98,60, 89,92, 76, 66, 81,97,84,94, 64, 63, 96, 64 Find the 8% percentile of this data set: Find the percentile of the observation 86. Round to the nearest whole number
2. The data set below is a sample of the Mathematics test scores of 10 students:...
2. The data set below is a sample of the Mathematics test scores of 10 students: 56, 96, 78, 67, 60, 69, 85, 90, 89, 72 (a) Find the mean and median of the given test scores. (b) Is there a mode value for these scores? Why or why not? (c) Find the range and standard deviation (nearest hundredth) of these scores. (d) Find the percentile rank of 78 (e) What percent of these scores are within 1 standard deviation...
For statistics expert The data in the table are simulated exam scores. Suppose the exam was...
For statistics expert
The data in the table are simulated exam scores. Suppose the exam was given in the semester after the course content was revised, and the previous mean exam score was 70. We would like to know whether or not the mean score has increased. Answer the following question using any approximate method by stating the necessary assumptions. The data are here: Simulated Exam Scores 75 70 88 80 80 66 65 68 85 80 78 72 69...
1. The scores on a given test for ten students were as follows: 20, 15,...
1. The scores on a given test for ten students were as follows: 20, 15, 18, 38, 42, 51, 23, 26, 20, 11 Find the mean. Find the median. Find the mode. Find the midrange. Find Q1 Find P60 Find the percentile rank for the score 38. Find the range. 2. Find the sample variance of the test scores. (Show work by hand to receive credit!) 3. Construct a box plot using the test score data. 4. Construct a...
Date: Course College of Westchester 10. The following are the scores of 30 college students on...
Date: Course College of Westchester 10. The following are the scores of 30 college students on a statistics test: 75 69 52 72 84 80 81 77 96 61 64 65 76 71 79 86 87 71 79 72 87 68 92 93 50 57 95 92 98 83 (a) Construct a stem-and-leaf display. (b) Determine the median and mode of the aforementioned data. (c) Calculate the mean and the range of the aforementioned data.
Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding...
Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding each answer to the nearest whole number. Using the frequency distribution below (scores on a statistics exam taken by 80 students), determine:ion 1 of the preliminary test (scores on a statistics exam taken by 80 students), determine: 68 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...
Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding...
Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding each answer to the nearest whole number. Using the frequency distribution below (scores on a statistics exam taken by 80 students), determine:ion 1 of the preliminary test (scores on a statistics exam taken by 80 students), determine: 68 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...
Question 1 15 pts Test scores for a class of 40 students are listed below: 25...
Question 1 15 pts Test scores for a class of 40 students are listed below: 25 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 a) The mean of the sample data is b) The median of the sample data is c) The standard deviation of the sample data is...
3. For the Data sets in the test scores example, find the following a). The IQR, compare the two interquartile ranges. b). Any Outliers in either set Minimum Q1 Median Q3 Maximum Day Night 32 25.5 55 76 73.5 81.5 82.5 87 99 97
(1 point) Here is a list of 20 scores on a Statistics midterm exam: 81,60, 98,95, 69, 88,98,60, 89,92, 76, 66, 81,97,84,94, 64, 63, 96, 64 Find the 8% percentile of this data set: Find the percentile of the observation 86. Round to the nearest whole number
For statistics expert
The data in the table are simulated exam scores. Suppose the exam was given in the semester after the course content was revised, and the previous mean exam score was 70. We would like to know whether or not the mean score has increased. Answer the following question using any approximate method by stating the necessary assumptions. The data are here: Simulated Exam Scores 75 70 88 80 80 66 65 68 85 80 78 72 69...
Date: Course College of Westchester 10. The following are the scores of 30 college students on a statistics test: 75 69 52 72 84 80 81 77 96 61 64 65 76 71 79 86 87 71 79 72 87 68 92 93 50 57 95 92 98 83 (a) Construct a stem-and-leaf display. (b) Determine the median and mode of the aforementioned data. (c) Calculate the mean and the range of the aforementioned data.
Question 1 15 pts Test scores for a class of 40 students are listed below: 25 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 a) The mean of the sample data is b) The median of the sample data is c) The standard deviation of the sample data is...
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