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...
26 students took an exam. Their scores are below: 64 65 69 62 72 94 86...
26 students took an exam. Their scores are below: 64 65 69 62 72 94 86 68 72 85 66 96 91 86 97 62 68 84 76 98 65 70 75 64 72 70 The 30th percentile is the closest to: 70 68 85 80 66 CE a o te hp
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
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...
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...
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...
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...
3.3 Table 3.10 shows the scores in the final examination F and the scores in two preliminary exam...
3.3 Table 3.10 shows the scores in the final examination F and the scores in two preliminary examinations P1 and P2 for 22 students in a statistics course. The data can be found in the book's Web site. (a) Fit each of the following models to the data: Model 1 F Bo BiP Model 2 F- Model 3 : F-k) + AP,+AP, + ε Table 3.10 Examination Data: Scores in the Final (F), First Preliminary (Pi), and Second Preliminary (P2)...
While the following simple random samples of Statistics test scores both come from populations that are...
While the following simple random samples of Statistics test scores both come from populations that are normally distributed, we do not know the standard deviation of the populations. The first simple random sample is drawn from the scores on Exam 1 for an on-line Statistics class and the second simple random sample is drawn from the scores on the exact same Exam 1 for an on-land (traditional) Statistics class. Using the null hypothesis that there is no difference in the...
26 students took an exam. Their scores are below: 64 65 69 62 72 94 86 68 72 85 66 96 91 86 97 62 68 84 76 98 65 70 75 64 72 70 The 30th percentile is the closest to: 70 68 85 80 66 CE a o te hp
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
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...
3.3 Table 3.10 shows the scores in the final examination F and the scores in two preliminary examinations P1 and P2 for 22 students in a statistics course. The data can be found in the book's Web site. (a) Fit each of the following models to the data: Model 1 F Bo BiP Model 2 F- Model 3 : F-k) + AP,+AP, + ε Table 3.10 Examination Data: Scores in the Final (F), First Preliminary (Pi), and Second Preliminary (P2)...
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