1. A professor grades students on a normal distribution. For any grade x, based on a...
A professor grades students on a normal curve. For any grade x, based on a coarse mean and standard deviation developed over years of testing. The following applies A: x > x + 1.6ơ B:え+0.40 < x < x +1.60 1. F: x x-1.6σ How many A, C, and D grades are given per 100 students?
A professor at a local college noted that the grades of his students were normally distributed with an average percentage of 74 and a population standard deviation of 10. He found that 6.3% of his students received A's while 2.5% of his students failed the course and received F's. Based upon the professor's grading scale, what was the minimun percentage needed to get an A in the course?
A professor at a local university noted that the grades of her students were normally distributed with a mean of 73 and a standard deviation of 11. Answer the following questions rounding your solutions to 4 decimal places. The professor has informed the class that 7.93 percent of her students received grades of A. What is the minimum score needed to receive a grade of A?
show all steps, thanks 3.2.21. A professor in a large statistics class has a grading policy such that only the 15% of the students with the highest scores will receive the grade A. The mean score for this class is 72 with a standard deviation of 6. Assuming that all the grades for this class follow a normal probability distribution, what is the minimum score that a student in this class has to get to receive an A grade?
Grades on a biology exam are approximately normally distributed with a mean of 78 and a standard deviation of 8. Originally Dr. Smith decides to curve course grades as follows: Students who score above the 90 percentile will receive an A Students whose scores are in the 80-89.percentiles receive a B Students whose scores are in the 70th-795h percentiles receive a C Students whose scores are in the 60-69 percentiles receive a D Students who score below the 60th percentile...
5. North Carolina State University posts the complete grade distributions for its courses online. The distribution of grades for all students in all sections of Accounting 210 in the spring semester of 2001 was Grade Probability .18 32 34 09 07 a. Using the scale A -4, B-3, C-2, D- 1, and F 0, let Xbe the grade of a randomly chosen b. Let X denote the mean grade for a random sample of 50 students from Accounting 210. Since...
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.56 and a standard deviation of 0.38. Using the empirical rule, what percentage of the students have grade point averages that are at least 1-422 Please do not round your answer Suppose that grade point averages of undergraduate students at one university have a bell shaped distribution with a mean of 2.61 and a standard deviation of 0.4 using the empirical...
The professor of a introductory calculus class has stated that, historically, the distribution of final exam grades in the course resemble a Normal distribution with a mean final exam mark of μ=63μ=63% and a standard deviation of σ=9σ=9%. If using/finding zz-values, use three decimals. (a) What is the probability that a random chosen final exam mark in this course will be at least 73%? Answer to four decimals. (b) In order to pass this course, a student must have a...
6. Properties of the normal curve Aa Aa The following figure shows the normal distribution with the proportion of the area under the normal curve contained within one, two, and three standard deviations of the mean. The last proportion on each side, 0.13%, depicts the remaining area under the curve. Specifically, 0.13% of the area under the standard normal distribution is located above z-score values greater than the mean (H) plus three standard deviations (+30). Also, because the normal distribution...
A humanities professor assigns letter grades on a test according to the following scheme. The grade of an A is given to the top 13% of scores in the class. The grade of a B is given to the scores below the top 13% and above the bottom 60%. The grade of a C is given to the scores below the top 40% and above the bottom 24%. The grade of a D is given to the scores below the...