Question
PSYC 2317 Introdudtion' Statistical Methods In-Class Activity #10 Chi SquareCritic - decisions posh private school have accused them of racism when making The school board the placement of "gifted" children into accelerated classes consulted various classroom tracks: Does sociologist Gheeli rucial distribution the evidence indicate racism? Justify your answer:WHITFBLACKACCELERATED CLASSROOMMAINSTREAM CLASSROOM108Psychologists who study personality traits have identified two behavi
PSYC 2317 Introdudtion' Statistical Methods In-Class Activity #10 Chi Square Critic - decisions posh private school have accused them of racism when making The school board the placement of "gifted" children into accelerated classes consulted various classroom tracks: Does sociologist Gheeli rucial distribution the evidence indicate racism? Justify your answer: WHITF BLACK ACCELERATED CLASSROOM MAINSTREAM CLASSROOM 108 Psychologists who study personality traits have identified two behavior patterns; Type Perconaivand Type personality- The Type . personality has been characterized a5 aggressive and time-pressured whereas the Type personality is more relaxed and mellow. Some researchers= helievethat Type personalities = more likely suffer heart attacks and other physical ailments than Type group of cardiac rehabilitation nurses took - tandom personalities_ sample of 80 people and administered _ personality test = deterune their personality type: Each participant was also asked if he or she had ever had heart attack The following represents the observed frequencies for each category Does the evidence indicate personalities more likely experience heart attacks than Type _ Type personalities? Justify Quranswet Type _ Personality Type Personality Heart Attack No Heart Altack
Answers
The psychology department is gradually changing its curriculum by increasing the number of online course offerings. To evaluate the effectiveness of this change, a random sample of $n=36$ students who registered for Introductory Psychology is placed in the online version of the course. At the end of the semester, all students take the same final exam. The average score for the sample is $M=76 .$ For the general population of students taking the traditional lecture class, the final exam scores form a normal distribution with a mean of $\mu=71$. a. If the final exam scores for the population have a standard deviation of $\sigma=12,$ does the sample provide enough evidence to conclude that the new online course is significantly different from the traditional class? Use a two-tailed test with $\alpha=.05$ b. If the population standard deviation is $\sigma=18,$ is the sample sufficient to demonstrate a significant difference? Again, use a two-tailed test with $\alpha=.05$ c. Comparing your answers for parts a and b, explain how the magnitude of the standard deviation influences the outcome of a hypothesis test.