Scores on a recent national statistics exam were normallydistributed with a mean of 88 and...
Scores on a recent national statistics exam were normallydistributed with a mean of 88 and a standard deviation of 2.1. What is the probability that a randomly selected exam willhave a score of at least 85?2. What percentage of exams will have scores between 89 and92?3. If the top 5% of test scores receive merit awards, what isthe lowest score eligible for an award?I do not understand how to compute probability.
please help me do thisFinal exam scores in a Math class with large number of...
please help me do thisFinal exam scores in a Math class with large number of students have mean 151 and standard deviation 4.1. Provided the scores of this Final exam have a nearly symmetric/bell-curve distribution, what percent of students score below 142.8 OR above 146.9 cal Enter a Points possible: 5 Unlimited attempts. Score on last attempt: 0. Score in gradebook: 0 Message instructor about this question more License
It is observed that the scores of a typical student in Math 477on Exam I...
It is observed that the scores of a typical student in Math 477on Exam I are normally distributed with mean 50 and standarddeviation 5, while their scores on Exam II are independently andnormally distributed with mean 55 and standard deviation 12.Suppose you are a typical student. What is the probability that thetotal of your scores on Exam I and II exceeds 150?
Scores on an exam follow an approximately Normal distributionwith a mean of 76.4 and a...
Scores on an exam follow an approximately Normal distributionwith a mean of 76.4 and a standard deviation of 6.1 points. Whatpercent of students scored below 70 points?
The mean and standard deviation of SAT math exam scores were 527and 120, respectively, in...
The mean and standard deviation of SAT math exam scores were 527and 120, respectively, in 2017. Assume that the scores are normallydistributed and answer the following questions. a. Find the 30thpercentile. b. If your score is 700, what percentage of thestudents got higher scores than you in 2017? c. What percentage ofstudents got SAT math scores from 400 to 600? d. If your score is650, what is the percentile of your score?
Statistics exam scores follow a standard normal distributionwith mean 0 and standard deviation 1. Find...
Statistics exam scores follow a standard normal distributionwith mean 0 and standard deviation 1. Find each of the followingprobabilities of the given scores.(a)Less than 2.71(b)Greater than -0.96(c)Less than -2.18(c)Between -1.30 and 0.45(d)Find the 75th percentile of these Statistics exam scores.(e) Find the Statistics exam scores that can be used as cutoffvalues separating the most extreme (high and low) 2% of allscores.
Suppose that distribution of Math SAT scores for incoming freshman at Etown has a mean of...
Suppose that distribution of Math SAT scores for incoming freshman at Etown has a mean of 535 and a standard deviation of 30. What is the probability that the average Math SAT score in a class containing 35 students is between 500 and 550?
A final exam in Math 160 has a mean of 73 with standard deviation 7.73
A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are less than 69?
6. Math instructors are not only interested in how their students do on exams, on average,...
6. Math instructors are not only interested in how their students do on exams, on average, but how the exam scores vary. To many instructors, the variance, or standard deviation, may be more important than the average. Suppose a math instructor believes that the standard deviation for his final exam is 4.3 points. One of his best students thinks otherwise. The student claims that the standard deviation is more than 4.3 points. The student asks 15 of his classmates for...
3. A normal distribution of BMCC MATSI scores has a standard deviation of 1.5. Find the...
3. A normal distribution of BMCC MATSI scores has a standard deviation of 1.5. Find the z-scores corresponding to each of the following values: a. A score that is 3 points above the mean. b. A score that is 1.5 points below the mean. c. A score that is 2.25 points above the mean 4. Scores on BMCC fall 2017 MATI50.5 department final exam form a normal distribution with a mean of 70 and a standard deviation of 8. What...
