EDUC812 Quiz One_Sample t_test

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Liberty University *

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812

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Statistics

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Feb 20, 2024

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Quiz: One-Sample t-Test Due Jan 28 at 11:59pm Points 50 Questions 25 Time Limit 120 Minutes Instructions The quiz: « Covers the Textbook material from Module 2: Week 2. « Contains 25 multiple-choice questions. « Is limited to 2 hours. « Allows 1 attempt. « Is worth 50 points. The quiz will also cover the assignments for Module 2: Week 2. Each quiz will be open-book/open- notes. Submit this assignment by 11:59 p.m. (ET) on Sunday of Module 2: Week 2. Attempt History Attempt Time Score LATEST Attempt 1 24minutes 48 outof 50 (@ Correct answers are hidden. Score for this quiz: 48 out of 50 Submitted Jan 23 at 8:19pm This attempt took 24 minutes. Question 1 2lzes Interpret the effect size (n?) for: t(90)= 3.66, p= .04,n? = 138 Large Question 2 2U2 et Normality is best represented visually using a

Question 3 22 If the Shapiro-Wilks test is statistically significant: the assumption of normality is considered not met. Question 4 2l2Zp A researcher plans to do a study to see whether people who exercise everyday have different blood pressure as compared to blood pressure of people who are in the general population. Thus, the independent variable is exercise and the dependent variable is blood pressure. What analysis would be the best choice to analyze the data? one-sample f-test Question 5 22y When conducting an one-sample t-test, the assumption of Normality s tested using: Shapiro-Wilks or Kolmogorov-Smimov

Question 7 2Zrs When hundreds or thousands of random samples are drawn from the same population, and a sample statistic such as M is calculated for each sample, the value of M varies across samples. This variation across samples is called . It occurs because, just by chance, some samples contain a few unusually high or low scores. Sampling Error Question 8 2lzes AType Il error occurs when the researcher did not reject the null when nullis false. True Question 9 2020 The one-sample t-test is used to determine if there is a difference between a selected sample mean and a population mean. True False Question 10 2/2pts Aone-samples t-test is appropriate for seeing a correlation between two variables on a ranked scale.

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Question 11 2z f the alpha level is .0, then the confidence level is 95% Question 12 2/2pts Based on these results, {(90)= 1.87, p=.07, n? = .13, what can the educational researcher say about the null hypothesis? Fail to reject the null hypothesis Question 13 2/2pts We reject the null hypothesis for the one-sample ttest if p<.05 m Question 14 0/2pts I Anhistogram is used for what purpose when conducting an one- sample t test? The homogeneity of variance assumption Question 15 2/2pts If all other values are held constant, what happens to the value of twhen sample size increases?: tincreases

Question 16 2iZrs Interpret the effect size (n?) for: (34) = 0.62, p = .04, Small Question 17 2/2pts Asample is a subset of some population of interest. True Question 18 2/2pts There are a total of 27,985 students that attend Liberty University Online. Out of those students, there are a total of 4,865 students who are enrolled in the Online Education Department at Liberty University. The education department wanted to examine the typical age of students enrolled in Education and found that it was 45 years old compared to the general population at Liberty University which was 31 years old. What is the population mean in this example? 31 Question 19 2/2pts ‘The results of a study that used an one-samples t test was t(23) = 3.20, p =01 Based on these results, what were the degrees of freedom?

Question 20 2/2pts AType error occurs when a researcher rejects the null hypothesis when the null hypothesis is correct. Question 21 2/2pts Based on these results, 1(90)= 3.66, p = .04,n2 =25, what can the educational researcher say about the null hypothesis? Reject the null hypothesis Question 22 2/2pts The Kolmogorov-Smirnov tests for what assumption? ‘The normality assumption Question 23 2/2pts In most educational research, f p < .05 then you shouid: Reject the null

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Question 24 2/2pts Which of the following is a measure of effect size used for a one- sample t test? Cohen's d Question 25 2/2pts Never make which of the following statements? p=.000 Quiz Score: 48 out of 50 ‘Submission Details: Time: 24 minutes Current Score: 48 out of 50 Kept Score: 48 out of 50