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PSYC 354 HOMEWORK 4 SAMPLING AND PROBABILITY

PSYC 354 HOMEWORK 4 SAMPLING AND PROBABILITY

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PSYC 354HOMEWORK 4Sampling and ProbabilityWhen submitting this file, be sure the filename includes your full name, course and section.Example: HW4_JohnDoe_354B01Be sure you have reviewed this module/week’s lesson and presentations along with the practicedata analysis before proceeding to the homework exercises. Complete all analyses in SPSS, thencopy and paste your output and graphs into your homework document file. Answer any writtenquestions (such as the text-based questions or the APA Participants section) in the appropriateplace within the same file.Questions 1–15Part I: ConceptsThese questions are based on the Nolan and Heinzen reading andend-of-chapter questions.Questions 1-10Fill in the highlighted blanks to answer/complete the statements.1)When a sample has similar characteristics to the population from which it wasdrawn, the sample is said to be ________.If a finding based on a sample also applies beyond that sample to the entirepopulation, that finding is said to have high external _______.2)3)The duplication of the results of a research study in a different context or with adifferent sample is called ________.4)Your own estimate of the likelihood that you will win a contest is known as a(n)________.5)Expected relative-frequency probability is computed as the number of ________divided by the number of ________.6)The ________ group is the group receiving the intervention or treatment of interest.7)A statement that 2 populations are different from one another is a(n) ________hypothesis.8)If you find that the groups you studied differed from each other more than would beexpected by chance alone, you ________ the null hypothesis.9)When you fail to reject the null hypothesis but the null hypothesis is in fact false,you have made a(n) ________ error.Page 1 of 5PSYC 35410)When you reject the null hypothesis but the null hypothesis is in fact true, you havemade a(n) ________ error.Question 11a-11bA school psychologist is interested in whether longer recess breaks affect time on task in theclassroom. She divides students into two groups: one with a standard recess length of 10minutes, and one with a longer recess length of 18 minutes, and assesses their time on task inthe classroom over a period of 4 weeks.11-a) What is the likely null hypothesis for this experiment?Answer11-b) What is the likely research hypothesis for this experiment?AnswerQuestion 12-15Complete the following exercises:12) What is the probability ofhitting a target if, in the longrun, 15 out of every 125attempts actually hit the target?Answer (show work)13) On a TV game show, 6people have won the grandprize and a total of 159 peoplehave competed. Estimate theprobability of winning thegrand prize.Answer (show work)14) Convert the followingproportions to percentages:a) 0.356b) .9

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