The grades for Economics students at a large university are found to be normally distributed with a mean of 76 and a standard deviation of 4. What proportion of the students are expected to have a grade between 84 and

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Statistics

The grades for Economics students at a large university are found to be normally distributed with a mean of 76 and a standard deviation of 4. What proportion of the students are expected to have a grade between 84 and 88?

statistics

2. The grades on a statistics midterm exam were normally distributed with a mean of 72 and a standard deviation of 8. a. What is the proportion of students received a B grade. b. What is the proportion of students that failed the exam? c. What is the grade of the 92nd percentile?

statistics

Suppose that the height of male students at a large university is normally distributed with a mean of 69 inches and a standard deviation of 3.0 inches. If 16 samples consisting of 25 students each are obtained, what is the probability that the mean of these 16 samples is ...

Algebra

Mr. Smith has 100 students in his Algebra classes. The grades of a quiz are normally distributed with a mean of 70 and a standard deviation of 4. Sally claims that 75 students scored between 66 and 74 on this quiz. Given that this is normally distributed, is Sally correct?

statistics

Suppose that on a certain examination in advanced mathematics, students from University A achieve scores which are normally distributed with a mean of 625 and a variance of 100, and that students from University B achieve scores which are normally distributed with a mean of ...

statistics

If the grades on a police entrance exam are normally distributed with a mean of 100 and a standard deviation of 15, what percentage of students received grades of less than 115?

math help

A survey was done recently by the Royal Bank with Ipsos Reid (reported in Globe and Mail Aug 16 2010) about financial issues that university students face. (Data used here is based on that survey, but randomized to be still within the margin of error of that survey.) The ...

stats

A survey was done recently by the Royal Bank with Ipsos Reid (reported in Globe and Mail Aug 16 2010) about financial issues that university students face. (Data used here is based on that survey, but randomized to be still within the margin of error of that survey.) The ...

algebra

Mr. Smith has 100 students in his Algebra classes. The grades of a quiz are normally distributed with a mean of 70 and a standard deviation of 4. Sally claims that 75 students scored between 66 and 74 on this quiz. Given that this is normally distributed, is Sally correct? ...

algebra

Mr. Smith has 100 students in his Algebra classes. The grades of a quiz are normally distributed with a mean of 70 and a standard deviation of 4. Sally claims that 75 students scored between 66 and 74 on this quiz. Given that this is normally distributed, is Sally correct? ...

math

Mr. Smith has 100 students in his Algebra classes. The grades of a quiz are normally distributed with a mean of 70 and a standard deviation of 4. Sally claims that 75 students scored between 66 and 74 on this quiz. Given that this is normally distributed, is Sally correct? ...

statistics

the dean of admissions in a large university has determined that the scores of the freshman class in a mathematics test are normally distributed with a mean of 86 and a standard deviation of 11. A sample of 50 students is selected at random from the entire freshman class. ...

Normal Probability Distribution

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 ...

Industrial Psychological Research

what is the proportion of students with a raw score less than 10? if information was collected from fellow students the rating on a 5 point scale on 5 different questions. given a normally distributed population with a mean of 13, a standard deviation of 3, and 50 as the ...

Algebra II

The grades on the last math exam had a mean of 88%. Assume the population of grades on math exams is known to be normally distributed with a standard deviation of 6. What percent of students earn a score between 72% and 90%? (5 points) 0.6255 0.5843 0.6754 0.5346

statistics

The GPAs of all students enrolled at a large university have an approximately normal distribution with a mean of 3.02 and a standard deviation of .29. Find the probability that the mean GPA of a random sample of 20 students selected from this university is 2.87 or lower

university of phoenix

4.Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. Do not use web-calculator to answer the following questions. Instead, you need to use the Z distribution table in ...

statistics

The distribution of grades of 50 students in a certain subject is normally distributed with a mean of 86 and a standard deviation of 12. 6. 7. If the passing grade is 75, how many failed in the subject?

statistics

Large group of students took a test in English and the final grades have a mean of 75 and a standard deviation of 8. If we can approximate the distribution of these grades by a normal distribution. What percentage of the students (ii) Should pass the test (grades >= 60) (...

statistics(business)

Large group of students took a test in English and the final grades have a mean of 75 and a standard deviation of 8. If we can approximate the distribution of these grades by a normal distribution. What percentage of the students (ii) Should pass the test (grades >= 60) (...

Statistics

The scores for math test #3 were normally distributed. If 15 students had a mean score of 74.8% and a standard deviation of 7.57, how many students scored above an 85%?

statistics

The scores for math test #3 were normally distributed. If 15 students had a mean score of 74.8% and a standard deviation of 7.57, how many students scored above an 85%?

statistics

Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4 There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?

Statistics

Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?

statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 115.8, and the standard deviation is about 32.9. A teacher ...

Statistic

professor has found that the grades on a Statistics Exam are normally distributed with mean 72 and a standard deviation of 12. If only the best 15 % of the grades in the class will get an A, what grade must a student get in order to get an A?

statistics

In one history class, 34 students took an exam. The mean of the exam was 52 with a standard deviation of 13. If the instructor is going to assume data are normally distributed and assign grades on a curve, then she will assign an A to the top 10% of the class, B's to the next ...

statistics

Assume that the population of heights of female college students is approximately normally distributed with mean m of 66 inches and standard deviation s of 4.00 inches. Show all work. (A) Find the proportion of female college students whose height is greater than 65 inches. (B...

statistics

Suppose a college's SAT scores are normally distributed with mean 1000 and standard deviation 1 for students above 1200. What percentage of students is eligible for scholarships

math-true/false

9.)The actual weight of 2-pound sacks of salted peanuts is found to be normally distributed with a mean equal to 2.04 pounds and a standard deviation of 0.25 pounds. Given this information, the probability of a sack weighing more than 2.40 pounds is 0.4251. **TRUE OR FALSE...

stats please help ASAP!!!

A. The GPAs of all 5540 students enrolled at a University have an approximately normal distribution with a mean of 3.02 and a standard deviation of 0.29. Let x be the mean GPA of a random sample of 48 students selected from this University. Find the mean and standard deviation...

statistics

The number of pizzas consumed per month by university students is normally distributed with a mean of 9 and a standard deviation of 5. What is the probability that in a random sample of size 10, a total of more than 80 pizzas are consumed? (Hint: What is the mean number of ...

stats

The president of a large university wishes to estimate the average age of the students presently enrolled. From past studies, the standard deviation ó is known to be 2 years. A sample of 50 students is selected and the mean is found to be 23.3 years. a. Find the 99% ...

stats

scores on a University exam are normally distributed with a mean of 68 and a standard deviation of 9. use the 68-95-99.7 rule to answer the following questions 1) what proportions of students score between a 59 to 77? 2) what proportions of students score between a 50 to 86? 3...

statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 115.8, and the standard deviation is about 32.9. A teacher ...

statistics

Percentage grades in a large physics class follow a normal distribution with mean 58. It is known that 3% of students receive grades less than 39.2. What is the standard deviation of grades in the class?

statistics

4. The scores on a university examination are normally distributed with a mean of 62 and a standard deviation of 11. If the bottom 5% of students will fail the examination, what is the lowest score, to the nearest whole number, that a student can have and pass?

stats (please help)

Assume that the population of heights of male college students is approximately normally distributed with mean  of 69 inches and standard deviation  of 3.75 inches. Show all work. (A) Find the proportion of male college students whose height is greater than 70 ...

statistics

A survey found that women's heights are normally distributed with mean 63.5 in. and standard deviation 2.3 in. The survey also found that men's heights are normally distributed with a mean 68.7 in. and a standard deviation 2.8. (a) Most of the live characters at an amusement ...

statistics probability

Alice earned a score of 940 on an IQ test.The mean test score was 850 with a standard deviation of 100.(Assume that test scores are normally distributed). Q1a).What proportion of students had a higher score than alice? Qb)Find the score exceeded by 2.5% of the students.

statistics

In a psychology class of 100 students, test scores are normally distributed with a mean of 80 and a standard deviation of 5. Approximately what percentage of students have scores between 70 and 90? A. 68% B. 80% C. 95% D. 99%

Statistics

The heights of male students in a given university are normally distributed, with a mean of 70 inches and a standard deviation of .5 inches. Find the height (x value) that corresponds to the z value of -1.33.

Math

The marks obtained by a number of students in a certain subject are approximately normally distributed with mean 65 and standard deviation 5. If 3 students are selected at random from this group, what is the probability that at least 1 of them would have scored above 75

statistics

If the ages of colleges students are normally distributed with a mean of 27 years and a standard deviation of 3.4, what is the probability that a sample of 34 students would have an average age of at least 25.6 years

math

the mean weigh of 500 male students at a certain college is 151 lb , and the standard deviation is 15 lb. assuming that the weights are normally distributed , how many students weigh more then 181 lb.

Statistics

The marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. (a) Given that the pass mark is 20, estimate the number of students who passed the examination. (b) If 5.59% of the students obtain a distinction by...

science

the mean weight of 500 males students at a certain college is 151 lb and standard deviation is 15lb .assuming the weights are normally distributed, find how many students weigh between 120 and 155 lb ..ii) more than 185 lb

statistics

1. The on-campus housing costs for a semester at a state university are Normally distributed with a mean of $1553 and a standard deviation of $329. (a) What is the distribution of the mean on-campus housing cost for a semester at this university for a random sample of 50 ...

math

Suppose the scores of students on an exam are normally distributed with a mean of 393 and a standard deviation of 57. According to the empirical rule, what percentage of students scored between 279 and 507 on the exam

Quantitative methods

the mean and standard deviation of the grades of 500 students who took an maths exam were 69 and 7 respectively. if the grades have a bell shaped distribution, how many of these students received a grade of more than 83 marks?

Quantitative methods

the mean and standard deviation of the grades of 500 students who took an maths exam were 69 and 7 respectively. if the grades have a bell shaped distribution, how many of these students received a grade of more than 83 marks?

Algebra 2

The heights of 200 kindergarten students are normally distributed with a mean of 40 and a standard deviation of 1.8 inches. Approximately how many students have a height between 37.3 inches and 44.5 inches?

Business Statistics

There are 300 students enrolled in Business Statistic. Historically, exam scores are normally distributed with a standard deviation of 30.9. Your instructor randomly selected a sample of 30 examinations and finds a mean of 74.2. Determine a 90% confidence interval for the mean...

Statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 119, and the standard deviation is about 27.8. A teacher suspects ...

graduate statistics

A nursing professor was curious as to whether the students in a very large class she was teaching who turned in their tests first scored differently from the overall mean on the test. The overall mean score on the test was 75 with a standard deviation of 10; the scores were ...

science

The mean weight of 500 male students at a certain college is 151 pounds (lb), and the standard deviation is 15 lb. Assuming that the weights are normally distributed, find the probability of students weight (a) between 121 and 155 lb (b) more than 185 lb. c) if 4% of the ...

college

Suppose that, for a certain exam, a teacher grades on a curve. It is known that the grades follow a normal distribution with a mean of 70 and a standard deviation of 7. There are 45 students in the class. How many students should receive an A? Please, round your answer to the ...

statistics

The scores of students on the ACT college entrance examination in a recent year had a normal distribution with a mean of 18.6 and a standard deviation of 5.9. A simple random sample of 50 students who took the exam is selected for study: A) What is the shape, mean, and ...

College of education ekiadolor Benin

The scores of an achievement test given to 100,000 students are normally distributed with mean 500 and standard deviation 100.what should the score of a student be to place him or her among the 10% of the students?

Statistics

`The average grade point average (GPA) of undergraduate students in New York is normally distributed with a population mean of 2.5 and a population standard deviation of 0.4. Compute the following, showing all work: 1) The percentage of students with GPA's between 2.0 and 2.6 ...

statistics

Can you please tell me how to solve for the following? Pedro took an exam in a class in which the mean was 64 with a standard deviation of 6. If his z score was +3, what was his exam score? A students commute to school is normally distributed with a mean of 31 min and a ...

statistics

College students average 7.8 hours of sleep per night with a standard deviation of 45 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 9 hours?

stats

scores on a university examination are normally distributed with a mean of 68 and standard deviation of 9. What percetnage of students scores above 77? The answer is 16% according to the professor that is correct. But I don't understand how the professor got to that answer.

statistics

A professor informs her class that a test is very difficult, but the grades will be curved. Scores for the test are normally distributed with a mean of 25 and a standards deviation of 5. If she curves the grades by adding 50 to each grade, What is the new mean? What is the new...

Statistics

The average grade point average(GPA)of undergraduate students in New York is normally distributed with a population mean of and a population standard deviation of. Compute the following, 1)The percentage of students with GPA'S between 2.0 and 2.6 2)If a sample of 49 students ...

STAT

The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. How many students would you expect to have weight between 162 pounds and 178 pounds?

statistics

the marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. Given that the pass mark is 20, estimate the number of students who passed the examination.

statistics

the marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. Given that the pass mark is 20, estimate the number of students who passed the examination.

science

3. In a sample of 64 students given an examination in statistics, it is found that the mean weight is 57 kg with standard deviation 9 kg. Find : Ć i) The proportion of students weight 48-62 kg. Ć ii) The proportion of those less than 72 kg. Ć iii) The proportion of ...

Foundations of Measurement

Approximately 400,000 students took the GRE in 2009. Observed mean for the Verbal score was 540 with a standard deviation of 80, and the observed mean quantitative score was 500 with a standard deviation of 100. Assuming distribution was normal, answer the following: How many ...

Analytical Skills

If your score on a statistics exam was 76 and the professor gave you the distribution for the exam score for your class, you could find your percentile to understand where you stand in comparison to your fellow students. Assume that the distribution for exam scores is normally...

statistics

2. The director of admissions at a large university advises students that the cost of textbooks will average more than $300 for a typical semester. A random sample of 80 students enrolled in the university shows a sample mean cost of $315.40 and a sample standard deviation of...

statistics

The IQ of 100 college students in XYZ univ are found to be normally distributed where mean is 105 and standard deviation is 8. If the student IQ score is 90, what is the probability that another student randomly slected has an IQ score of below 90.

statistics

A final exam in Math 157 is normally distributed and has a mean of 75 with a standard deviation of 12. If 36 students are randomly selected, find the probability that the mean of their test scores is greater than 70.

statistics

In a population of normally distributed aptitude scores of 1000 academy students with mean 70 and Standard deviation 10, how many score above 95?

math

on a mathematics test in high school, scores are normally distributed with a mean of 77 and a standard deviation of 16.8. A students is randomly selected.

falcon

the average score for a business examination comprising 300 students is 54%. if the marks are normally distributed with a standard deviation of 8%, determine the number of students scores above 70%

Statistics

The average score for a business examination comprising 300 students is 54%. If the marks are normally distributed with a standard deviation of 8%, determine the number of students scores above 70%.

statistics

Reading placement scores for a particular college are normally distributed with a mean of 72 and a standard deviation of 7. a) draw a sketch of the reading placement scores for students at this college. be sure to mark the mean and also to mark one and two standard deviations ...

biostatics

if height of 300 students is normally distributed with mean 68.00 inch and standard deviation 3.0 in ch. how manystudents have heights greater than 72 inches?

fundamentals math

A standard math test was given to 6000 students. The scores were normally distributed with a mean of 420 and a standard deviation of 40. If george scored 340, how many students scored more than George? This is hrd because I tried using calculator but that's not the help i need...

college stats

can someone please explain the steps: suppose that the grade point average,denoted by X,of a university student is Normally distributed with the mean 2.786 and standard deviation 0.375 A). a student is on the deans list if her GPA exceeds 3.746. What percent of the students ...

Statistics

12. The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past few years. It is estimated that approximately 94% of students now own a cell phone. Twenty five students are to be selected at random from a ...

algebra 2

Students at a high school all took the same English test. The scores are approximately normally distributed with a mean of 77 and a standard deviation of 9. If 2500 students took the test, approximately how many scored above 86 or below 68%?

Statistics

The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past few years. It is estimated that approximately 90% of students now own a cell phone and 10% do not own a cell phone. Fifteen students are to be ...

statistics

Dr. Snyder teaches a large introductory statistics course. In the past, the proportion of students that receive a grade of A is 0.20. The proportion that receives a B is 0.30. The proportion that receives a C is 0.30. The proportion that receives a D is 0.10. The proportion ...

Math-one more

The average length of time, per week, that students at a certain university spend on homework is normally distributed with a mean of 24.3 hours and a standard deviation of 1.4 hours. Jane tells her parents she spends more time studying than 75% of the students on campus. How ...

Maths statistics

In a 60 MA Economics students selected as sample are found to have a mean height of 68 inches and a 50 MBS students selected as sample have a mean height of 69 inches. Would you conclude that management students are taller than economics students? Assume that standard ...

Algebra

Over 350 students took a college calculus final exam. the scores of the students follow a normal distribution. using the information given below, determine the mean and the standard deviation for the students'scores. Give your answers to the nearest tenth of a percent. 1. 32% ...

statistics

Scores on a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4. Estimate the probability that among 75 randomly selscted students, at least 20 of them score greater that 78.

math

A chemist test involves measuring two independent quantities A and B, the expressing the results of the test as C such that C= 3A-0.5B. Give that A is normally distributed with mean 10 and standard deviation of 1, and B is also normally distributed with mean 34 and standard ...

statistics

The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied follows the normal ...

statistics

Suppose the amount of time it takes for statistics students to complete their midterm is normally distributed with a mean of 85.70 minutes and a standard deviation of 22.55 minutes. If 10 students are randomly selected, what is the probability that they would average less than...

STAT

The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. 1)How many students would you expect to have weight between 162 pounds and 178 pounds? 2)What is the probability that a...

STAT

The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. How many students would you expect to have weight between 162 pounds and 178 pounds? What is the probability that a ...

statistics

The scores on a national achievement test are normally distributed with a mean of 50 and a standard deviation of 10. Out of a group of 200 students, how many would you expect to score more than 70?

statistics

14) You wish to compare the average GPA of students from one department to another. It is assumed that the distributions of GPA in both departments are normally distributed and that the overall standard deviation of GPA is the same in both departments. If you sample 17 ...

Statistics

Students were given an exam with 300 multiple-choice questions. The distribution of the scores was normal and mean was 195 with a standard deviation of 30. What were the scores of the students who were within one standard deviation of the mean? What percent of students did ...

Statistiscs

Students in the psychology department consume an average of 5 cups of coffee per day with a standard deviation of 1.75 cups. The number of cups of coffee consumed is normally distributed. • What proportion of students consume an amount equal to or less than 6 cups a day...

Math

According to a student project for statistics 250, the amount of money spent on texts per semester by the population of students at a small liberal arts college is normally distributed with a mean of $426 and a standard deviation of $54. Determine the percent of all samples of...

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