Question

In: Statistics and Probability

2. Two sections of 70 Introductory Sociology students were taught with one section using no text...

2. Two sections of 70 Introductory Sociology students were taught with one section using no text and the other section using a popular introductory text. At mid-term, the same test was given to both sections with the following results: PLEASE SHOW WORK

             No Text         Popular Text

              n1=70            n2=70

             1=75           2=71

             S1=8             S2=10

  

a) Test for the significance of the difference between two population means (set α (alpha) =.01 level).

            b) Calculate the effect size (ES) and determine its strength.

Solutions

Expert Solution

Solution:

a) test calculation:

b) effect size calculation:

orchestra answered 1 year ago
Next > < Previous

Related Solutions

Two sections of a class in statistics were taught by two different methods. Students’ scores on...
Two sections of a class in statistics were taught by two different methods. Students’ scores on a standardized test are shown in Table 5.12 . Do the results present evidence of a difference in the effectiveness of the two methods? (Use α = 0.05.) Class A: 74, 97, 79, 88, 78, 93, 76, 75, 82, 86, 100, 94 Class B: 78, 92, 94, 78, 71, 85, 70, 79, 76, 93, 82, 69, 84 Include R code.
Students in an introductory economics course were assigned to practical classes taught by various assistant teachers....
Students in an introductory economics course were assigned to practical classes taught by various assistant teachers. The 21 students in the class of one of the assistant teachers obtained an average score of 59.6 in the final exam and a standard deviation of 5.0. The 18 of the second obtained an average score in the final exam of 85.2 and a standard deviation of 13.1. Suppose these data can be considered independent random samples from populations that follow a normal...
An instructor who taught two sections of MTH132, with 20 and 30 students respectively. The instructor...
An instructor who taught two sections of MTH132, with 20 and 30 students respectively. The instructor randomly select 15 students for a field trip. 1. What is the chance that exactly 10 of them are from the 2nd section? 2. What is the chance that at least 10 of them are from the 2nd section? 3. What is the chance that at least 10 of them are from the same section?
An instructor who taught two sections of engineering statistics last term, the first with 25 students...
An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 30, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (b) What is the probability that at least 10 of these are from the second section? (Round your answer to four decimal places.) (c) What is the probability that at least 10 of...
An instructor who taught two sections of engineering statistics last term (the first with 20 students...
An instructor who taught two sections of engineering statistics last term (the first with 20 students and the second with 30), decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. a. What is the probability that exactly 10 of these are from the second section? b. What is the probability that at least 10 of these are from the second section?
An instructor who taught two sections of engineering statistics last term, the first with 25 students...
An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 35, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (a) What is the probability that exactly 10 of these are from the second section? (Round your answer to four decimal places.) (b) What is the probability that at least 10 of these...
An instructor who taught two sections of engineering statistics last term, the first with 25 students...
An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 35, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (a) What is the probability that exactly 10 of these are from the second section? (Round your answer to four decimal places.) (b) What is the probability that at least 10 of these...
An instructor who taught two sections of engineering statistics last term, the first with 25 students...
An instructor who taught two sections of engineering statistics last term, the first with 25 students and the second with 30, decided to assign a term project. After all projects had been turned in, the instructor randomly ordered them before grading. Consider the first 15 graded projects. (a) What is the probability that exactly 13 of these are from the second section? (Round your answer to four decimal places.) (b) What is the probability that exactly 9 of these are...
Fifteen students were registered in Section 1 and 15 students were registered in Section 2 of...
Fifteen students were registered in Section 1 and 15 students were registered in Section 2 of a research course. They took the same midterm exam, and their exam scores were distributed as follows: Section 1:          89, 56, 45, 78, 98, 45, 55, 77, 88, 99, 98, 97, 54, 34, 94 Section 2:           77, 88, 87, 67, 98, 87, 55, 77, 45, 44, 88, 99, 69, 67, 98 Calculate the mode, median, mean, range, variance, and standard deviation for both...
The introductory biology class at a large university is taught to hundreds of students each semester....
The introductory biology class at a large university is taught to hundreds of students each semester. For planning purposes, the instructor wants to find out the average amount of time that students would use to take the first quiz if they could have as long as necessary to take it. She takes a random sample of 100 students from this population and finds that their average time for taking the quiz is 20 minutes, and the standard deviation is 10...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT