This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A college lecturer has devised a new method of teaching a particular mathematical concept and wishes ... (Read 15 times)

chandani

  • Hero Member
  • *****
  • Posts: 541
on: Jul 25, 2018
A college lecturer has devised a new method of teaching a particular mathematical concept and wishes to try out this teaching method on a representative sample of his students.
 
  There are 76 students in his class and he wishes to obtain a simple random sample of 25 of them. Describe a method he could use to obtain the sample.

Question 2

A study was conducted to determine if listening to heavy metal music affects critical thinking. To test the claim, 136 subjects were randomly assigned to two groups. Both groups were administered a basic math skills exam.
 
  The first group took the exam while heavy metal music was piped into the exam room, while the second group took the exam in a silent room. The mean exam score for the first group was 77, and the mean exam score for the second group was 91. The researchers concluded that heavy metal music negatively affects critical thinking. Identify (a) the research objective, (b) the sample, (c) the descriptive statistics, and (d) the conclusions made in the study.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jadwiga9

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 25, 2018
Answer to Question 1

Answers will vary. Possible answer: List the students' names alphabetically and assign them numbers 1 to 76 according to this list. Use a random number table to construct a list of 25 random numbers between 1 and 76 and select the students corresponding to those numbers.

Answer to Question 2

(a) if listening to heavy metal music affects critical thinking
(b) the 136 subjects
(c) the mean exam score for the first group = 77, and the mean exam score for the second group was 91
(d) that heavy metal music negatively affects critical thinking


chandani

  • Member
  • Posts: 541
Reply 2 on: Jul 25, 2018
Gracias!

smrtceo

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

The Scientific Method The Scientific Method
Concept of Illness by Children Concept of Illness by Children
Body Part, Method of Examination, and Equipment Used During the General Physical Examination Cont Body Part, Method of Examination, and Equipment Used During the General Physical Examination Cont
How to evaluate third-order determinants by Minors Method (Question 2) How to evaluate third-order determinants by Minors Method (Question 2)
Dosage Calculations: A Multi-Method Approach, 2nd Edition Dosage Calculations: A Multi-Method Approach, 2nd Edition
linear programming problem, applying simplex method and sensitivity analysis linear programming problem, applying simplex method and sensitivity analysis
Video: Burn Animation

For a complete list of videos, visit our video library