3. Explain what it means for a set of data to have a standard deviation of O. (Use complete, legible sentences and appropriate statistics terminology.)

MATLAB: An Introduction with Applications
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ISBN:9781119256830
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Part 2: Skills practice
1. The test scores of 40 students are listed below. Find P71: What is the percentile of a score of 71?
31
58
68
86
33 36 37
58 58 59
39 45 47 48 49 52
60 62 63 65 67 68
71 72 72 72 78 79 79 81 81
89 89
96 96 98
88
95
95
96
2. A student earned grades of 84, 78, 84, and 72 on her essays in her freshman composition course.
She warned a grade of 78 on the final exam and 86 on her midterm. The sum of all her homework
assignment scores totaled 92. Her teacher gives the following weights to each grade category:
Homework counts for 10%; essays for 20%; the midterm counts for 30%; the final exam counts
for the remaining 40%.
What is this students weighted mean grade in this course?
Transcribed Image Text:Part 2: Skills practice 1. The test scores of 40 students are listed below. Find P71: What is the percentile of a score of 71? 31 58 68 86 33 36 37 58 58 59 39 45 47 48 49 52 60 62 63 65 67 68 71 72 72 72 78 79 79 81 81 89 89 96 96 98 88 95 95 96 2. A student earned grades of 84, 78, 84, and 72 on her essays in her freshman composition course. She warned a grade of 78 on the final exam and 86 on her midterm. The sum of all her homework assignment scores totaled 92. Her teacher gives the following weights to each grade category: Homework counts for 10%; essays for 20%; the midterm counts for 30%; the final exam counts for the remaining 40%. What is this students weighted mean grade in this course?
Part 2: Skills practice
1. The test scores of 40 students are listed below. Find P71: What is the percentile of a score of 71?
31
58
68
86
33 36 37
58 58 59
39 45 47 48 49 52
60 62 63 65 67 68
71 72 72 72 78 79 79 81 81
89 89
96 96 98
88
95
95
96
2. A student earned grades of 84, 78, 84, and 72 on her essays in her freshman composition course.
She warned a grade of 78 on the final exam and 86 on her midterm. The sum of all her homework
assignment scores totaled 92. Her teacher gives the following weights to each grade category:
Homework counts for 10%; essays for 20%; the midterm counts for 30%; the final exam counts
for the remaining 40%.
What is this students weighted mean grade in this course?
Transcribed Image Text:Part 2: Skills practice 1. The test scores of 40 students are listed below. Find P71: What is the percentile of a score of 71? 31 58 68 86 33 36 37 58 58 59 39 45 47 48 49 52 60 62 63 65 67 68 71 72 72 72 78 79 79 81 81 89 89 96 96 98 88 95 95 96 2. A student earned grades of 84, 78, 84, and 72 on her essays in her freshman composition course. She warned a grade of 78 on the final exam and 86 on her midterm. The sum of all her homework assignment scores totaled 92. Her teacher gives the following weights to each grade category: Homework counts for 10%; essays for 20%; the midterm counts for 30%; the final exam counts for the remaining 40%. What is this students weighted mean grade in this course?
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The standard deviation is zero.

 

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