. Historical data shows that the scores in the Engineering Probability and Statistics course are normally distributed with a standard deviation of6 In a class of 50 students, the probability that th...
The final exam scores of students taking a statistics course are normally distributed with a population mean of 72 and a population standard deviation of 8. If a student taking this statistics course is randomly selected, what is the probability that his/her final exam score is between 60 and 84? A .4332 .9332 C .8664 .1336 Submit Answer
if statistics test scores were normally distributed with a mean of 81 and a standard deviation of 4, a) what is the probability that a randomly selected student scored less than 70? b) what percentage of students had a B on the exam? c) the top 10% of the class had what grades?
Scores on exam-1 for a statistics course are normally distributed with mean 65 and standard deviation 1.75. What scores separates highest 15% of the observations of the distribution ?
Problem 8. (1 point) Suppose the scores of students on a Statistics course are Normally distributed with a mean of 261 and a standard deviation of 66 What percentage of the students scored between 261 and 391 on the exam? (Give your answer to 3 significant figures) I percent.
The final exam scores in a statistics class were normally distributed with a mean of 70 and a standard deviation of 2. If you select a student at random, what is the probability that he scored between a 66 and a 74? A.2.5% B.50% C. 68% C. 95% D. none of the above
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(1 point) Suppose the scores of students on a Statistics course are Normally distributed with a mean of 574 and standard deviation of 40. What percentage of the students scored between 574 and 654 on the exam? percent (1 point) Suppose that X is normally distributed with mean 120 and standard deviation 29. A. What is the probability that X is greater than 163.21? Probability = B. What value of X does only the top 18%...
The final exam scores in a statistics class were normally distributed with a mean of 70 and a standard deviation of five. What is the probability that a student scored more than 75% on the exam? a) 0.95 b)0.68 c) 0.16 d)0.84
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 71 and a standard deviation of 8. Use the T1-84 PLUS calculator to answer the following. Round the answers to at least two decimals. (a) Find the 47 percentile of the scores (b) Find the 65 percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 12% of the class. What...
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 71 and a standard deviation of 8. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimals. ol. (a) Find the 47th percentile of the scores. (b) Find the 65th percentile of the scores. (c) The instructor wants to give an A to the students whose scores were in the top 12% of the class....
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 78 and a standard deviation of 7. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least two decimals. (a) Find the 34" percentile of the scores. (b) Find the 68th percentile of the scores. (C) The instructor wants to give an A to the students whose scores were in the top 11% of the class. What...