1. The time need to complete a final examination in a college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes.
In: Statistics and Probability
1. The time need to complete a final examination in a college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes.
In: Statistics and Probability
There are 398 students currently enrolled in a statistics course at your school. You wish to form
a sample of 4 students to answer some survey questions. Select the students who will belong to
the simple random sample by using the randomly generated number table below by starting in the
fourth row and first column.
35931 89035 23653 46370 28433
62632 81258 40557 19325 43161
28330 34629 79010 22483 95383
12441 20033 11802 03263 75380
Please let me know what fourth row and what first column is, and how to solve this problem easily.. And please give me the answer for this question.
In: Statistics and Probability
Write a program that reads a file consisting of students’ test scores in the range 0–200. It should then determine the number of students having scores in each of the following ranges: 0–24, 25–49, 50–74, 75–99, 100–124, 125–149, 150–174, and 175–200. Output the score ranges and the number of students. (Run your program with the following input data: 76, 89, 150, 135, 200, 76, 12, 100, 150, 28, 178, 189, 167, 200, 175, 150, 87, 99, 129, 149, 176, 200, 87, 35, 157, 189.
In: Computer Science
If the scores of a group of students who are high in
academic achievement (10 individuals) on the academic
self-
efficacy scale are as follows:
120-122-117-102-125-120-108-111-110-115
The scores of a group of students with low academic achievement (12 individuals) on the academic self-effectiveness scale are as follows:
72-69-72-75-77-80-68-75-77-87-70-85
Using spss, how to test the following
hypothesis:
There are no statistically significant differences between the mean
scores of the sample individuals on the academic self-efficacy
scale due to the difference in the achievement level of the
students (high - low).
In: Statistics and Probability
A political science professor is interested in comparing
students who do and do not vote in federal
elections. She computes the mean grade point average for a random
sample of 14 students who have voted in
the last federal election to be 2.51 with a standard deviation of
0.44. She computes the mean grade point average
for a random sample of 15 students who did not vote in the last
election to be 2.98 with a standard deviation of
0.56. Does the professor have statistically significant evidence,
using α = 0.02, to conclude that those who do
and those do not vote in federal elections have different mean
grade point averages?
In: Statistics and Probability
A survey of 500 high school students was taken to determine their favorite chocolate candy. Of the 500 students surveyed, 129 like Snickers, 118 like Twix, 145 like Reese's Peanut Butter Cups, 22 like Snickers and Twix, 54 like Twix and Reese's Peanut Butter Cups, 55 like Snickers and Reese's Peanut Butter Cups, and 8 like all three kinds of chocolate candy. How many students like Snickers, but not Twix or Reese's Peanut Butter Cups?
a) 129
b) 69
c) 61
d) 60
e) 121
f) None of the above.
In: Math
Geraldine is a kindergarten teacher with 20 stu- dents in her classroom. She runs a number of structured and unstructured activities in the classroom in which the children work individu- ally and in groups. She has found that when the students are in group activities that are less structured (e.g., when engaged in arts and crafts activities around a large table), some students act out. They engage in minor disruptive beha- viors that are reinforced by attention from the other children. Although the behaviors are not dangerous, they disrupt the class and set a bad example for the other students. Describe how Geraldine could use reprimands effectively to decrease the disruptive behavior.
In: Psychology
A professor is interested in whether taking online quizzes over a chapter before discussing the chapter in class will improve students’ test performance. The professor is interested in examining the testing effect, the finding that taking a memory test not only assesses what one knows, but also enhances later retention. The professor hypothesizes that students who take chapter quizzes will score higher on the midterm test than students who do not take chapter quizzes.
1. Design and describe an experiment that could test this hypothesis. Describe how this design could test the hypothesis.
2. Identify the IV and DV.
3. Provide an operational definition of each variable.
In: Psychology
You are interested in the time students usually spend studying for the final exams. Assume that the total study time during the final week in the semester among students is approximately Normally distributed with mean= 12 hours and a standard deviation = 4.4 hours . You initially plan to take a simple random sample of size n=50 and compute the average total study time.
In: Statistics and Probability