# 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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1. ## 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?
2. ## 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
3. ## 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
4. ## 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

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
6. ## 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
7. ## 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
8. ## 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?
9. ## 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?
10. ## 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?
11. ## 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
12. ## 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
13. ## 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,
14. ## 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
15. ## 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,
16. ## 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,
17. ## Math

A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they spent traveling to campus. This variable, travel time, was then
18. ## 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,
19. ## 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
20. ## 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
21. ## 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
22. ## Mathematics

Among 500 freshmen pursuing a business degree at a university, 313 are enrolled in an economics course, 205 are enrolled in a mathematics course, and 153 are enrolled in both an economics and a mathematics course. What is the probability that a freshman
23. ## Statistics

1. The mean and standard deviation of the grades of a group of students who took an economic exam  were 69 and 7, respectively. The grades have a mound-shaped distribution. According to the Empirical Rule,    a) Approximately 68% of the grades were
24. ## college

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with their students.
25. ## Statistics

a random group of seniors was selected from a university and asked about their plans for the following year. The school advising office claims that 50% of the students plan to work, 25% of the students plan to continue in school, and 25% of the students
26. ## 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
27. ## English

What do you want to do if you have a lot of money? 1. I want to donate a large sum of money to a society for poor people. To die with money is a shame.] 2. I will go abroad to study English. I like to go to Harvard University, where I will major in
28. ## essentials of economics

what do you known about economics becouse i do not got it These sites may help you. http://www.mcwdn.org/ECONOMICS/EconMain.html http://www.investopedia.com/university/economics/ notes on- social protection health education defence public order and safety
29. ## statistics

The Dean of a university claims that no more than 10% of the students drop out of university. She chooses a random sample of 500 students and decides that she will accept the claim only if no more than 25 of the 500 students drop out of university. In fact
30. ## statistik

the average starting salary of this yaer's graduates of a large university (LU)is \$25000 with a standard deviation of \$5000.futhermore,it is known that the starting salaries are normally distributed. a)what is the probability that a randomly selected LU
31. ## Statisitcs

A large university campus has 60,000 students. The president of the students' association wants to conduct a survey of the students to determine their views on an increase in the student activity fee. She would like to acquire information about all the
32. ## 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?
33. ## 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?
34. ## Stats

A public heath official wanted to know how often university students visit their student health centers due to illness or injury. The official took a nationwide random sample of 120 university students and found an average of (x bar) = 2.30 visits per
35. ## Math

2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a random sample of grades achieved by 8 female students. Male 78 87 75 64 90 80 65 86 74 81 Female 71 50 80 75 90 61 85 81 Test
36. ## statistics

1. A simple random sample of 400 students is taken at a large university. The average height of the sampled students is 68 inches and the SD is 2 inches. The distribution of heights in the sample follows the normal curve very closely. An approximate 68%
37. ## statistics

1. A simple random sample of 400 students is taken at a large university. The average height of the sampled students is 68 inches and the SD is 2 inches. The distribution of heights in the sample follows the normal curve very closely. An approximate 68%
38. ## Statistics

Exam Grades. A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below.) At á = 0.05, can it be
39. ## NYU

NYU(New York University)? Is it tough to get into? like I want to become an artist and a writer so what addmission and grades (SAT, GPA, AND GRADES), school clubs ???? THANK U
40. ## 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,
41. ## statistics

Q. The MBA department is concerned that dual degree students may be receiving lower grades than the regular MBA students. Two independent random samples have been selected. 100 observations from population 1 (dual degree students) and 100 from population 2
42. ## statistical psychology

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students.
43. ## statitics

17. Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other
44. ## probability and statistics

Chapter 9: 17. Do students at various universities differ in how sociable they are? Twenty-five Students were randomly selected from each of three universities in a region and Were asked to report on the amount of time they spent socializing each day with
45. ## Psychology/Statistics

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students.
46. ## statistics

. Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other
47. ## statistics

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students.
48. ## statistics

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students.
49. ## College statistics

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students.
50. ## Math

A state university wants to increase its retention rate of 4% for graduating students from the previous year. After implementing several new programs during the last two years, the university reevaluated its retention rate. Identify the Type I error in
51. ## Computer

Write a C++ program that uses 2 functions the first is to read an array of students’ grades and return the sum of the all grades to the main program. And the second function will receive the sum of all grades from the main program and calculate and print
52. ## 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
53. ## MARH

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students.
54. ## statistics

An instructor in a large lecture class found at the end of the semester that total points scored by students in his class was approximately Normal with mean 530 and standard deviation 80. If 10% of the class are to receive A's (he grades on a curve), what
55. ## statistics

In a large Midwestern university, 30% of the students live in apartments. If 200 students are randomly selected, find the probability that the number of them living in apartments will be between 55 and 70 inclusive.
56. ## statistics

In a large class, there were 220 students who wrote both the midterm and the final exam. The standard deviation of the midterm grades was 14, and that of the final exam was 20. The correlation between the grades on the midterm and the final was 0.60. Based
57. ## 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.
58. ## 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
59. ## 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
60. ## statistics!

1) Entry to a certain University is determined by a national test. The scores on this test are normally distributed with a mean of 500 and a standard deviation of 100. Tom wants to be admitted to this university and he knows that he must score better than
61. ## MATH

The ratio of graduate students to undergraduate studaent at a certain university is 4 to9. if there are 2340 students at the university how many undgergraduates are there?
62. ## 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

The director of admissions at a large university says that 15% of high school juniors to whom she sends university literature eventually apply for admission. In a sample 0f 300 persons to whom materials were sent, 30 students applied for admission. In a
64. ## 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?
65. ## Math

Two students are talking after school: What is the average of your grades in Math for September? 4.6 That is impossible since the year just started. You could not possiblly have that many grades. What was the doubting student thinking of of the possible
66. ## Math

There are 1,800 students at a high school. Of the students who have smoked at least one cigarette in the last month, five-eighteenths are twelfth graders. Thirty-five percent of the remaining students are eleventh graders, and the rest are in the ninth and
67. ## Math - Need help please

There are 1,800 students at a high school. Of the students who have smoked at least one cigarette in the last month, five-eighteenths are twelfth graders. Thirty-five percent of the remaining students are eleventh graders, and the rest are in the ninth and
68. ## probability and statistics

a certain university in the region has a population of 20000 students distributed into 15 courses and four year levels.if you would like to determine the sample size, what technique can be applied
69. ## Statistics

You want to estimate the grades of st2%atistics students who gets grades of C or better. How many students should you survey to be 95% confident that the sample percentage is off by no more than 2 percentage points.
70. ## statistics

You want to estimate the grades of st2%atistics students who gets grades of C or better. How many students should you survey to be 95% confident that the sample percentage is off by no more than 2 percentage points.
71. ## statistics

IQ scores are normally distributed and assume that the average IQ for all Economics majors is 108 with a standard deviation of 11. What percentage of Economics majors would have an IQ of more than 118?
72. ## mathematical methods for economics

in a class of 300 students,they were given mathematics test in three subjects namely,economics,statistics and mathematics,90 students failed in economics,100 failed in statistics,96 failed in mathematics,60 failed in economics and statistics,64 failed in
73. ## 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
74. ## statistics

In a study of the effect of college student employment on academic performance, the following summary statistics for GPA were reported for a sample of students who worked and for a sample who did not work.( university of central florida undergraduate
75. ## 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.
76. ## statistics

A professor is interested in determining whether assigning mandatory homework affects students’ grades. He is currently teaching two sections of the same class; in one class, he assigns mandatory homework problems, while in the second class, he just
77. ## 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
78. ## economics

A professor of economics gives multiple choice exams each semester. He curves the exams by giving the maximum possible points to the high score on the exam. For example, if a 50 question exam is worth 100 points and the top score in the class is 40, then
79. ## Economics

Suppose a university decides to alter its tuition schedule by separating its students based on how many years of college they have completed. Most university programs require four years to complete. First-year students would get a 13% tuition reduction.
80. ## to mrs. sue: essay cont.

I wrote two of my paragraphs yesterday about how colleges do offer life skills but students have to apply it. These are my next two paragraphs and i was wondering if you can correct my grammar. An example of a class offered in college that benefits
81. ## Need help in business studies, econ or computing?

I'm a CIE (Cambridge International Exams) A Level student who gave her A2 exams in October... *expecting results this month*... Anyway, my subjects were Economics, Business Studies and Computing. I got good grades in my AS exams, and also managed to get an
82. ## 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
83. ## algebra

Please show work* . i don't get how to do this at all only 1/3 of the university students wanted to become teachers . if 2600 didn't want to become teachers, how many university students are there?
84. ## statistics

Entry to a certain University is determined by a national test. The scores on this test are normally distributed with a mean of 500 and a standard deviation of 100. Tom wants to be admitted to this university and he knows that he must score better than 70%
85. ## statistics

34 percent of the undergraduate students in a large university have full-time jobs. A random sample of 26 undergraduate students are selected. What is the variance of the number of students who have full-time jobs in such a sample? Calculate to two decimal
86. ## database

University XYZ needs a database that keeps track of students, what classes they taken and the grades for each of the classes. In addition, they need to know what instructors are on staff and the courses they are approved to teach. It is necessary to track
87. ## Probability/Statistics

Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired
88. ## stat

1. The MBA department is concerned that dual degree students may be receiving lower grades than the regular MBA students. Two independent random samples have been selected 350 observations from population 1 (dual degree students) and 310 from population 2
89. ## 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
90. ## 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
91. ## Psychology

A recent research study found that surfing the internet and accessing non-academic grades resulted in lowering students GPA. Dr. Rushmore studied the relationship between grades and non-academic surfing in a first-year introduction to psychology class.
92. ## Economics

Suppose a university decides to alter its tuition schedule by separating its students based on how many years of college they have completed. Most university programs require four years to complete. First-year students would get a 13% tuition reduction.
93. ## Statistics

A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 463 students was x = 118 minutes. Suppose that we know that the study time follows a Normal
94. ## Behavioral Statistics Help!

The majority of the data is normally distributed if there are enough subjects. For instance, if you collected test scores of only a few honor students, the data will most likely not be normally distributed because you would have a sample that did not
95. ## economics

What are the principals of economics and where could I find 3 articles on the economy identifying 1 principal on each You very well may mean princIPLES. This is a catch all phrase. There are many economic textbooks called Principles of Economics and many
96. ## 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
97. ## 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
98. ## MATH URGENT!!!!

An investigator was interested in studying the effect of taking a course in child development on attitudes toward childrearing. At the end of the semester, the researcher distributed a questionnaire to students who had taken the child development course.
99. ## 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
100. ## 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