
d. The distribution of results on the ACS Exam in Analytical Chemistry is Gaussian, with an...
Suppose test scores on a certain exam follow a normal distribution with μ = 70. If 8% of students scored above 80, what is the standard deviation of the distribution?
Scores on an exam follow an approximately Normal distribution with a mean of 76.4 and a standard deviation of 6.1 points. What percent of students scored below 70 points?
A group of students take Exam the average was M = 68 and the standard deviation was SD = 8. If a student scoreda 70 on the exam, what percentage of students scored BELOW her ?
The scores in a Math Contest follow the Gaussian Distribution. Arvind scores 75 out of 100. The average score for the test is 60. The Standard deviation is 15. The top 10 percent of the Contest are eligible for Scholarship. What is the Least score needed to qualify? Will Arvind qualify? What percentage of students scored lower than Arvind?
After receiving your graded midterm, you are told that the exam had an approximately normal distribution. You are told by your proof that you scored a standard deviation above average. You scored higher than what percent of students?
3. Exam grades across all students across all sections of an introductory statistics class are approximately normally distributed with a mean of 72 and a standard deviation of 11. Use the normal distribution to find answer the following questions. a. What percent of students scored above a 90%? b. What percent scored below 60%? c. If the lowest 5% of students will be required to attend an extra study session, what grade is the cutoff for being required to attend...
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 120, while the mean score was 79 and the standard deviation was 8. 55,63,71,79,87,95,103 Distribution of Test Scores What is the approximate percentage of students who scored between 79 and 103 on the test? % What is the approximate percentage of students who scored lower than 55 on the test? % What is the approximate percentage of students who...
Each year about 1500 students take the introductory statistics course at a large university. This year scores on the nal exam are distributed with a median of 74 points, a mean of 70 points, and a standard deviation of 10 points. There are no students who scored above 100 (the maximum score attainable on the nal) but a few students scored below 20 points. (a) Is the distribution of scores on this nal exam symmetric, right skewed, or left skewed?...
The average score of students taking a statistics final was 70 with a standard deviation of 5. Assuming a normal distribution, what is the probability that a student scored less than 65?
For typical data sets the following rules of thumb hold: 65% of data are within the interval [Average - StDev, Average + StDev] 95% of data are within the interval [Average - 2*St Dev, Average + 2*StDev] 13. A recent ACT administered to a local high school yielded the following results: Mean = 24.4 and Standard Deviation = 4.2. Which of the following is true? (5 points) a. 65% of the students scored between 16 and 32.8 b. 95% of...