Question

In: Statistics and Probability

MAT 240 Applications of Two-Sample Tests I asked half of my students how often they exercise...

MAT 240 Applications of Two-Sample Tests

I asked half of my students how often they exercise each week.

Population 1 (My students) Sample Size: 10

Population 1 Student Responses: 0, 0, 2, 3, 5, 5, 5, 5, 5, 6

For the second population, I asked students in the classroom next door (which has kids that are 3 years older than my students) the same question.

Population 2 (Classroom next door): Sample Size: 10

Population 2 Student Responses: 2, 3, 3, 4, 4, 5, 5, 5, 6, 7

I hypothesize that students in older classrooms exercise more. Test my hypothesis at a .05 significance level.

Expert Solution

calculating mean square for pooled samples

Distribution Table for t

orchestra answered 2 years ago

MAT 240- Applications of Two-Sample Tests I questioned people in 2 states, Texas and Washington. I...

MAT 240- Applications of Two-Sample Tests I questioned people in 2 states, Texas and Washington. I noticed that out of 400 people in Texas, 267 said they would buy a pickup over a car, while out of 237 people in Washington, 97 said they would buy a pickup over a car. I hypothesize that more people in Texas would buy a pickup over a car. Test this with a 0.05 significance.

The data for this exercise are from a sample of twelfth-graders. The students were asked how...

The data for this exercise are from a sample of twelfth-graders. The students were asked how often they wear a seat belt while driving, and for this exercise, we combine the responses for "never" and "rarely" and for "most times" and "always" and ignore the "sometimes" responses. A contingency table of the results for males and females follows. Seat Belt Use Most Times or Always Rarely or Never Total Female 964 101 1065 Male 914 269 1183 Total 1878 370...

When I sit and watch my students take exams, I often think to myself "I wonder...

When I sit and watch my students take exams, I often think to myself "I wonder if students with bright calculators are impacted by the pretty colors." This leads me to wonder if there is a difference in the exam scores of students with colorful calculators versus the exam scores of students with plain black calculators. To investigate further, I took a sample of past students. There were 49 students with colorful calculators with a mean exam score of 84...

A random sample of college students was asked to respond to a survey about how they...

A random sample of college students was asked to respond to a survey about how they spend their free time on weekends. One question, summarized in the table below, asked each respondent to choose the one activity that they are most likely to participate in on a Saturday morning. The activity choices were homework, job, recreation, or other. Homework Job Recreation Other Male 29 35 23 9 Female 18 43 39 4 a. If one student is randomly chosen from...

I need to send my students I am doing distant classes a test How do I...

I need to send my students I am doing distant classes a test How do I do this and have them answer it without the ability for the to keep it or print it out

A sample of college students was asked how much they spent monthly on coffee. Approximate the...

A sample of college students was asked how much they spent monthly on coffee. Approximate the standard deviation for the cost. Monthly coffee cost ($) Number of students 10.00-19.99 6 20.00-29.99 20 30.00-39.99 . 23 40.00-49.99 18 50.00-59.99 . 6 The sample standard deviation for the cost is (Round to the nearest cent as needed.)

A sample of college students was asked how much they spent monthly on pizza. Approximate the...

A sample of college students was asked how much they spent monthly on pizza. Approximate the standard deviation for the cost. Monthly pizza cost. total number of students 10.99-19.99 7 20.99-29.99 20 30.99-39.99 23 40.99-49.99 20 50.99-59.99 5 The sample standard deviation for the cost is (round to nearest cent)

A sample of 130 working students at a large university was asked how many hours they...

A sample of 130 working students at a large university was asked how many hours they work in a typical week. A 95% z confidence interval for the average number of hours a week a typical student employee works was (13.5, 15.3) (a)Identify each of the following interpretations as TRUE or FALSE with a brief explanation for each. i. 95% of sampled student workers work between 13.5 and 15.3 hours in a typical week. ii. We are 95% confident that...

Trosset chapter 15.7 exercise 8. A class of 35 students took two midterm tests. Jack missed...

Trosset chapter 15.7 exercise 8. A class of 35 students took two midterm tests. Jack missed the first test and Jill missed the second test. The 33 students who took both tests scored an average of 75 points on the first test, with a standard deviation of 10 points, and an average of 64 points on the second test, with a standard deviation of 12 points. The scatter diagram of their scores is roughly ellipsoidal, with a correlation coefficient of...

Exercise 3. In a class survey, students are asked how many hours they sleep per night....

Exercise 3. In a class survey, students are asked how many hours they sleep per night. In the sample of 22 students, the (sample) mean is 6.77 hours with a (sample) standard deviation of 1.472 hours. We wish to know if this shows that the class’s student population on average has not gotten at least the recommended 8 hours of sleep at the α = .1 level. The distribution of sleep for this population follows a normal distribution. a. Write...