Quiz_ One-Sample t-Test_ EDUC812_ Advanced Educational Statistics (B06)

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Liberty University *

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Feb 20, 2024

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Skip to Main Content Quiz: One-Sample t-Test Due Jan 28 at 11:59pm Points 50 Questions 25 Time Limit 120 Minutes Instructions Attempt History Attempt Time Score LATEST Attempt 1 80 minutes 50 out of 50 Correct answers are hidden. Score for this quiz: 50 out of 50 Submitted Jan 25 at 10:28pm This attempt took 80 minutes. 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. 2 / 2 pts Question 1 Normality is best represented visually using a Scatter Plot Online Residential Athletics Sign In Request Info Apply Now Visit Us Create Guest Account
Histogram Trend Chart Pie Chart 2 / 2 pts Question 2 A Type II error occurs when the researcher did not reject the null when null is false. True False 2 / 2 pts Question 3 The Kolmogorov-Smirnov tests for what assumption? The normality assumption The homogeneity of variance assumption The assumption of extreme outliers 2 / 2 pts Question 4 Interpret the effect size ( η ) for: t (34) = 0.62, p = .04, η = .01 2 2
Small Medium Large 2 / 2 pts Question 5 A one-samples t-test is appropriate for seeing a correlation between two variables on a ranked scale. True False 2 / 2 pts Question 6 When conducting an one-sample est, the assumption of Normality is tested using: Shapiro-Wilks or Kolmogorov-Smirnov Levene Wilks Lambda Cronbach's Alpha 2 / 2 pts Question 7
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We reject the null hypothesis for the one-sample t- test if p < .05 p > .05 p = .05 2 / 2 pts Question 8 Based on these results, t( 90)= 1.87, p= .07, η = .13, what can the educational researcher say about the null hypothesis? 2 Reject the null hypothesis Fail to reject the null hypothesis 2 / 2 pts Question 9 If the Shapiro-Wilks test is statistically signi±cant: the assumption of normality is considered met. the assumption of normality is considered not met. 2 / 2 pts Question 10
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. Standard deviation Type I error Type II Sampling Error 2 / 2 pts Question 11 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 2 / 2 pts Question 12 Never make which of the following statements? p < .05
p = .000 p < .001 p > .05 2 / 2 pts Question 13 A Type I error occurs when a researcher rejects the null hypothesis when the n ull hypothesis is correct. True False 2 / 2 pts Question 14 Suppose you read the following in a journal. Using a one-sample t - test the author reported that t (23) = 1.27, p = .21. Should the author reject or fail to reject the null? reject the null fail to reject the null 2 / 2 pts Question 15
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Based on these results, t( 90)= 3.66, p = .04, η = . 25, what can the educational researcher say about the null hypothesis? 2 Reject the null hypothesis Fail to reject the null hypothesis 2 / 2 pts Question 16 A researcher plans to do a study to see whether people who eat an all carbohydrate diet have different cholesterol levels than people in the general public. The dependent variable in this study is diet. cholesterol levels. 2 / 2 pts Question 17 When looking for extreme outliers using a box and whisker plot, the extreme outliers will have an asterisk (*) next to the data point. True False 2 / 2 pts Question 18
In most educational research, if p < .05 then you should: Reject the null Fail to reject the null 2 / 2 pts Question 19 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? 45 31 2 / 2 pts Question 20 If all other values are held constant, what happens to the value of t when sample size increases?: t increases t decreases ( m - m ) increases 1 2
( m - m ) decreases 1 2 2 / 2 pts Question 21 If the alpha level is .05, then the con±dence level is 90% 95% 100% 2 / 2 pts Question 22 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? .01 23 3.20 28 2 / 2 pts Question 23
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A sample is a subset of some population of interest. True False 2 / 2 pts Question 24 Which of the following is a measure of effect size used for a one- sample t test? Chi-square Cohen’s d d.f. 2 / 2 pts Question 25 A histogram is used for what purpose when conducting an one- sample t test? The normality assumption The signi±cance of the t test The homogeneity of variance assumption Quiz Score: 50 out of 50