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HTH 320 Test 2: Statistical Hypothesis Testing Questions and Answers, Exams of Statistics

James Madison University (JMU)Statistics

A comprehensive set of questions and answers covering key concepts in statistical hypothesis testing. it's ideal for students preparing for exams in introductory statistics courses. The questions cover topics such as assumptions of t-tests, degrees of freedom, research designs (between-subjects, within-subjects, pre-post, matched pairs), standard error, the central limit theorem, type i and type ii errors, effect size, and more. the answers are clearly marked, making it a valuable self-assessment tool.

Typology: Exams

2024/2025

Available from 05/05/2025

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HTH 320 TEST 2 QUESTIONS WITH 100% CORRECT ANSWERS
What are the assumptions of a two-independent-sample t-test? -- Answer ✔✔
Normality, random sampling, independence, equal variances
What are the assumptions of a one-sample t-test? -- Answer ✔✔ Normality, random
sampling, independence
What is the degrees of freedom for a two-independent sample t-test? -- Answer ✔✔
(n1-1)+(n2-1)
What is the degrees of freedom for a one-sample t-test? -- Answer ✔✔ n-1
This is a type of research design in which different participants are observed at one time
in each group or at each level of one factor. -- Answer ✔✔ Between-subjects design
Another name for a factor is... -- Answer ✔✔ Variable
Another name for a level is... -- Answer ✔✔ Group
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Download HTH 320 Test 2: Statistical Hypothesis Testing Questions and Answers and more Exams Statistics in PDF only on Docsity!

HTH 320 TEST 2 QUESTIONS WITH 100% CORRECT ANSWERS

What are the assumptions of a two-independent-sample t-test? -- Answer ✔✔ Normality, random sampling, independence, equal variances What are the assumptions of a one-sample t-test? -- Answer ✔✔ Normality, random sampling, independence What is the degrees of freedom for a two-independent sample t-test? -- Answer ✔✔ (n1-1)+(n2-1) What is the degrees of freedom for a one-sample t-test? -- Answer ✔✔ n- 1 This is a type of research design in which different participants are observed at one time in each group or at each level of one factor. -- Answer ✔✔ Between-subjects design Another name for a factor is... -- Answer ✔✔ Variable Another name for a level is... -- Answer ✔✔ Group

What is an "unbiased estimator" of the population variance? -- Answer ✔✔ Sample variance As the sample size approaches 30 or above, the sample assumes -- Answer ✔✔ Normality This assumption declares that each option has an equal chance of being selected. -- Answer ✔✔ Random Sampling This assumption proves no relation. -- Answer ✔✔ Independence This study design is a type of repeated-measures design in which researchers observe the same participants across many treatments but not necessarily before and after a treatment. -- Answer ✔✔ Within-subjects design This study design is a type of repeated-measures design in which researchers measure a dependent variable for participants before and after a treatment. -- Answer ✔✔ Pre- post design This research design is where participants are selected and matched experimentally or naturally, based on common characteristics or traits. -- Answer ✔✔ Matched pairs design What factor decreases standard error? -- Answer ✔✔ A smaller population standard deviation

Cohen's D measures the number of ________ that mean scores are shifted above or below the population mean. -- Answer ✔✔ Standard deviations All of the following are measures of effect size EXCEPT -- Answer ✔✔ Theta-squared SEM or Sm -- Answer ✔✔ one-sample t-test SEM or Sm1-m2 -- Answer ✔✔ two-independent-sample t-test SEM or Smd -- Answer ✔✔ related-samples t-test