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1. The scores in final of the engineering students in their EDA class are normally distributed with a mean of 84 and a standard deviation of 6. Using the empirical rule "68-95-99.7". Find the percentage of the class that: a. Score is above 90. b. Score is below 72. c. Score is below 90 but above 78.

1. The scores in final of the engineering students in their EDA class are normally distributed with a mean of 84 and a standard deviation of 6. Using the empirical rule "68-95-99.7". Find the percentage of the class that: a. Score is above 90. b. Score is below 72. c. Score is below 90 but above 78.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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1. The scores in final of the engineering students in their EDA class are normally distributed with a mean of 84 and a standard deviation of 6. Using the empirical rule "68-95-99.7". Find the percentage of the class that: a. Score is above 90. b. Score is below 72. c. Score is below 90 but above 78. 2. The average test scores of students in Mathematics class were 75 with a standard deviation of 9. There are 500 students in this class. Use the positive and negative z-score table to answer the following questions. a. What is the probability of randomly selecting students with a score of less than 65? b. How many students scored above 85? c. The middle 40% of test scores fall between what two points? 3. There are nine people to sit at a round table with eight chairs. How many sitting arrangements can they form if two always sit together? 4. In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?
Transcribed Image Text:1. The scores in final of the engineering students in their EDA class are normally distributed with a mean of 84 and a standard deviation of 6. Using the empirical rule "68-95-99.7". Find the percentage of the class that: a. Score is above 90. b. Score is below 72. c. Score is below 90 but above 78. 2. The average test scores of students in Mathematics class were 75 with a standard deviation of 9. There are 500 students in this class. Use the positive and negative z-score table to answer the following questions. a. What is the probability of randomly selecting students with a score of less than 65? b. How many students scored above 85? c. The middle 40% of test scores fall between what two points? 3. There are nine people to sit at a round table with eight chairs. How many sitting arrangements can they form if two always sit together? 4. In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?
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