c. ) Hagrid thinks that giving students hands on experience with magical creatures will increase their exam scores. He lectures on a creature and then gives a test. Then he has the students play with a creature and gives them a test. He compares the student’s scores on both tests to see if he was correct
(a)
Correct option:
Independent-samples t test.
Explanation: The 2 Samples (i) scores of 50 students of Gryffindor and (ii) scores of 50 students of Slytherin are independent.
(b)
Correct option:
Single-sample t test
Explanation: this years scores on the OWLs exam is compared with the mean score from the last 10 years . Since she does not know the standard deviation, t test is employed instead of Z test.
(c)
Correct option:
Paired-sample t test
Explanation: The 2 samples are not independent. The same student is measured twice: before and after the lectures.
Below are a list of studies that members of the Hogwarts community are doing. However, they...
For the following, determine what test to run. These answers include more than correlations and t-tests. A researcher wants to know if there is a relationship between whether or not a community has a neighborhood watch program (where residents walk the streets of the neighborhood) or not, and its rate of violent crimes over the past 12 months. What test would be used to assess this relationship? 2. Another researcher is also interested in the effectiveness of neighborhood watch programs...
1. A sleep researcher believes that people deprived of sleep for 24 hours will perform worse on a short-term memory test than a group not deprived of sleep. She randomly assigns some volunteers to the sleep deprivation group and others to the control group and intends to compare their scores on the short-term memory test. Parametric Test: repeated-measures t-test independent-measures t test Nonparametric Test: Kruskal-Wallis test repeated-measures t-test Mann-Whitney U-test 2. An educational psychologist believes using flash cards to memorize...
10.3Thank you:) Complete parts (a) through (c) below. (a) Determine the critical value(s) for a right-tailed test of a population mean at the a = 0.01 level of significance with 15 degrees of freedom. (b) Determine the critical value(s) for a left-tailed test of a population mean at the a = 0.01 level of significance based on a sample size of n = 10. (c) Determine the critical value(s) for a two-tailed test of a population mean at the a...
Eight studies are described briefly below. What research method was employed in these studies, also write the rationale of your choice of response. 1. A researcher is interested in whether drinking water right before bed increases the likelihood that children will wet the bed at night. The researcher recruits 50 5-year-old children to participate in her study. Twenty-five children are given two glasses of water two hours before their bedtime (one glass per hour) and twenty-five children are prohibited from...
Professor Gill has taught General Psychology for many years. During the semester, she gives three multiple-choice exams, each worth 100 points. At the end of the course, Dr Gil gives a comprehensive alworth 200 poset, and represent students scores on exams 1, 2, and respectively. Let X represent the student's score on the final exam. Last semester De Gil had 25 students in her cess. The student exam scores are shows below 73 75 152 93 185 91 90 180...
List three specific laboratory test results that are consistent with development of a bacterial infection CASE STUDY CYSTIC FIBROSIS Berial mised o For the Disease Summary for this case study se the CD-ROM this PATIENT CASE cient lent Patient's Chief Complaints Provided by patient's mother: "I noticed a let-down in T's exercise tolerance level a week ago and the last couple of days his cough and sputum production have gotten much worse. When he started having breathing problems, I brought...
Which two specific laboratory test results above suggest that the patient is not vitamin K deficient? CASE STUDY CYSTIC FIBROSIS Berial mised o For the Disease Summary for this case study se the CD-ROM this PATIENT CASE cient lent Patient's Chief Complaints Provided by patient's mother: "I noticed a let-down in T's exercise tolerance level a week ago and the last couple of days his cough and sputum production have gotten much worse. When he started having breathing problems, I...
Which clinical evidence indicates that cirrhosis has not developed in this patient as a result of cystic fibrosis? CASE STUDY CYSTIC FIBROSIS Berial mised o For the Disease Summary for this case study se the CD-ROM this PATIENT CASE cient lent Patient's Chief Complaints Provided by patient's mother: "I noticed a let-down in T's exercise tolerance level a week ago and the last couple of days his cough and sputum production have gotten much worse. When he started having breathing...
Describe the pathophysiology that is causing pallor in this patient. The patient is showing signs of pallor in the results, what is the pathophysiology behind this ? CASE STUDY CYSTIC FIBROSIS Berial mised o For the Disease Summary for this case study se the CD-ROM this PATIENT CASE cient lent Patient's Chief Complaints Provided by patient's mother: "I noticed a let-down in T's exercise tolerance level a week ago and the last couple of days his cough and sputum production...
Which clinical evidence indicates that hypoproteinemia secondary to cystic fibrosis is not an issue in this patient? CASE STUDY CYSTIC FIBROSIS Berial mised o For the Disease Summary for this case study se the CD-ROM this PATIENT CASE cient lent Patient's Chief Complaints Provided by patient's mother: "I noticed a let-down in T's exercise tolerance level a week ago and the last couple of days his cough and sputum production have gotten much worse. When he started having breathing problems,...