Degrees of freedom df - Study guides, Class notes & Summaries

PSYC 515 Module 5: Week 5 Quiz: Non-parametric Tests Concepts Score for this quiz: 50 out of 50 Submitted Jul 18 at 7:13am This attempt took 21 minutes. Question 1 0 / 0 pts I have read and understand the Academic Honor policy as outlined in the Online Honor Code for Liberty University Online. I agree to abide by this policy and that the work submitted herein is my own. Yes No Question 2 2 / 2 pts Wilcoxon rank-sum test is to _____ as Wilcoxon matched-pairs signed-ranks T test is to _____. ordin...

I am using x to predict y. When I know the value of x, the mean-squared-error of my estimate of y is less than when I don't know x. - answers-x explains some of the variance in y If the SSmodel is greater than the SSresidual... - answers-the model accounts for more than 50% of the total variance What is the coefficient of determination? - answers-The proportion of variance accounted for in the dependent variable by the predictor variables. What is the relationship between r and beta in...

ATLS EXAM 1 STUDY EXAM Body's Center of Mass/Gravity* - CORRECT ANSWER-ant. to Sacrum Sagittal Plane* - CORRECT ANSWER-y/z plane axis = X/med. lat. movements = flex/ext, dorsi-/plantar flex, forward/backward bending Frontal/Coronal Plane* - CORRECT ANSWER-x/y plane axis = Z/ant. post. movements = abd/add, lat. flex, ulnar & radial deviation; eversion & inversion Horizontal/Transverse Plane* - CORRECT ANSWER-x/z plane axis = Y/sup. inf./vertical/longitudinal movements = int/ex rot, ax...

Mike tabulated the following values for heights in inches of seven of his friends: 65, 71, 74, 61, 66, 70, and 72. The sample standard deviation is 4.577. Select the 95% confidence interval for Mike's set of data. 59.95 to 76.91 59.95 to 72.67 64.19 to 76.91 64.19 to 72.67 RATIONALE In order to get the 95% CI , we first need to find the critical t-score. Using a t-table, we need to find (n-1) degrees of freedom, or (7-1) = 6 df and the corresponding CI. Using the 95% CI in t...

PSYC 515 Research Methods & Statistics II Week 2 - Quiz - ANOVA Concepts. Quiz: ANOVA Concepts LATEST Attempt 1 42 minutes 50 out of 50 Score for this quiz: 50 out of 50 Submitted Jul 5 at 4:43am This attempt took 42 minutes. Question 1 I have read and understand the Academic Honor policy as outlined in the Online Honor Code for Liberty University Online. I agree to abide by this policy and that the work submitted herein is my own. Yes No Question 2 2 / 2 pts Scenario: Does emotional...

A researcher has a table of data with four column variables and three row variables. The value for the degrees of freedom in order to calculate the statistic is __________. 12 6 3 11 RATIONALE Recall to get the degrees of freedom we use df = (r-1)(c-1) where c and r are the number of rows and columns. This means df = (4-1)(3-1) = 3*2 =6. CONCEPT Chi-Square Test for Association and Independence 2 7/2/2020 Sophia :: Welcome What value of z* should be used to construct a...

A company has developed a new computer sound card whose average lifetime is unknown. In order to estimate this average, 200 sound cards are randomly selected from a large profuction line and tested; their average lifetime is found to be 5 years. The 200 sound cards represent a: - correct answer Sample In inferential statistics we seek to infer? - correct answer Population Parameters Statistics is ...

Adam tabulated the values for the average speed on each day of his road trip as 60.5, 63.2, 54.7, 51.6, 72.3, 70.7, 67.2, and 65.4 mph. If Adam wanted to construct a one-sample t-statistic, what would the value for the degrees of freedom be? 4 7 9 8 RATIONALE The degrees of freedom for a 1 sample t-test are df=n-1 where n is the sample size. In this case, n=8, then df = n-1 = 8-1 = 7. CONCEPT T-Tests 2 9/18/2020 Sophia :: Welcome Steven measures the weight of a rando...

values that organize and describe the characteristics of a collection of data sometimes called a data set. - descriptive statistics tools that are used to make infer characteristics of a population, based on data from that population. - inferential statistics a subset of the population - sample all the possible subjects or cases of interests - population A method of investigation used to demonstrate cause-and-effect relationships by purposely manipulating variable(s) thought to produ...

A characteristic or condition that changes or has different values for different individuals - correct answer Variable measurements or observations - correct answer Data Collection of measurements or observations - correct answer A data set A singular measurement or observation and is commonly called a "score" or "raw score" - correct answer ...