In: Economics
Suppose you have a class with 9 students. Create an Array called
StudentName and StudentGrade which contains the student's name and
the student's final grade.
Create a function called "GetStudentInfo" for who you will pass the
arrays and the user will enter the data for those 9 students.
Back in main, loop through both arrays and display the information
for each student after its entered in GetStudentInfo
I need a C++ code for visual studio. Can anyone help me? I'll thumb up.
In: Computer Science
Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of 500 and a standard deviation of 100. Find the probability that a student will score...
a) over 650
b) less than 459
c) between 325 and 675
d) If a school only admits students who score over 680, what proportion of the student's pool would be eligible for admission?
e) what limit (score) would you set that makes the top 20% of the students eligible?
In: Statistics and Probability
Dean suspects that statistics teacher increase the grades of the class of 75 students due to his endless love to his beloved students. Dean realized that average grade of previous statistics classes is 64 and she took some of the exams from student affairs departments and note the following grades: 65 75 98 34 76 52 80 84 68. Please help dean to conduct a statistical analysis and (15 points) interpret the results. (15 points)
In: Statistics and Probability
1) Professor Barson wants to know if his advanced statistics class has a good grasp of basic math. Six students are chosen at random from the class and given a math proficiency test. The six students get scores of 62, 92, 75, 68, 83, and 90.
a. Conduct a hypothesis test to see whether the mean score from this year’s class is different than last year’s class mean of 80. Then, construct a 95% confidence interval for this year’s class mean.
In: Statistics and Probability
In: Statistics and Probability
For the following, the data set has a mean of ? = 100 and a standard deviation of ? = 20. Find the following areas under the curve for the region that is:
1) Less than 100
2) Greater than 160
For the following, scores on a psychology exam were normally distributed with a mean of 67 and a standard deviation of 8. Find the following:
1) What percentage of scores were below 83?
2) If 500 students took the exam, approximately how many students scored below 75?
In: Statistics and Probability
Use the given degree of confidence and sample data to construct a confidence interval for the population mean μ .
Assume that the population has a normal distribution. The principal randomly selected six students to take an aptitude test. Their scores were: 72.3 87.0 82.6 86.1 84.5 74.8 Determine a 90 percent confidence interval for the mean score for all students.
a. 86.30 < μ < 76.13
b. 76.13 < μ < 86.30
c. 76.03 < μ < 86.40
d. 86.40 < μ < 76.03
In: Statistics and Probability
A research conducts a study to determine whether there is an association between time students spent on revising the exam and level of level of exam anxiety among undergraduate. The researcher recruited 10 nursing students. To help the researcher, you need to do the hand calculation and then you use the SPSS
|
Time spent revision |
Exam anxiety |
|
.40 |
10 |
|
1.30 |
9 |
|
2.15 |
8.5 |
|
3.40 |
6 |
|
4.30 |
1.5 |
|
4.00 |
3 |
|
3.45 |
5 |
|
2.30 |
7 |
|
2.00 |
8.5 |
|
1.15 |
9 |
In: Statistics and Probability
A school is interested in whether its student's scores on a
standardized test exceed the
national average. The national average is 40 (μ = 40) and the
standard deviation is 8 (cr =
8). To determine this, the school officials administer the test to
a sample of 16 (n = 16)
students and obtain a mean score of 44 (M = 44). Perform a z-test
to determine whether
the students in the school differ significantly from the
national average. Perform a two-
tailed test. Compute the obtained z score.
In: Statistics and Probability