QUESTION 14 What is the paired-samples t test statistic for the following difference scores:-2.-19, +17, -22,...
1. What does the paired-samples t-test test for? 2. The paired-samples t-test utilizes a within-subjects design. What is the main difference between a within-subjects design and a between subjects design? 3. What is the difference between a repeated measures and a matched design?
The equation for the paired-samples t test is the same as that for the single-samples t test except that the data are now difference scores. True False
In a paired samples t test, explain the logic of difference scores (why do you need to find them to make conclusions about your research) and why do you compare it to a population mean often designated as zero (µ = 0)?
Imagine that a researcher is conducting a paired-samples t test. She finds that the sample mean difference is 5, the standard deviation of the difference scores is 15, and the sample size is 85. The researcher is also using a typical null hypothesis that proposes no differences between the relevant population means. Under these circumstances, what is the value of the paired-samples t statistic? Please retain a minimum of three decimal places for all steps (if relevant) and provide a...
Original pairs of scores are first reduced to difference scores before computing the test statistic for the related samples t-test. Question 10 options: True False
The test statistic for a related samples t-test is computed using a single sample of Options: Original data Standardized scores Raw scores Difference scores
Question 19 4 pts Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is ud = 0. Compute the value of the t test statistic. Round final answer to three decimal places as needed. 9 5 7 3 12 7 S 6 O t = 0.578 O t= 1.292 Ot=2.890 O t= 0.415
Q2) Paired-Samples t Test (14 points) A research project has been tracking the health and cognitive functions of the elderly population in Arizona. The table below shows the memory test scores from 10 elderly residents, tested first when they were 65 years old and again when they were 75 years old. The researcher wants to know if there is a significant decline in memory functions from age 65 to age 75 based on this sample. In other words, it is...
Problem 2. (17 points) The t statistic for a test of Ho : u = 19 Ha:u > 19 based on n = 17 observations has the value t = 1.61. (a) What are the degrees of freedom for this statistic? 16 (b) Using the appropriate table in your formula packet, bound the p-value as closely as possible: <p-value < Note: You can earn partial credit on this problem.
9.28 Assume we know the following for a paired-samples t test: N -32, Mdifference -1.75, s -4.0. a. Calculate the t statistic. b. Calculate a 95% confidence interval for a two-tailed test. c. Calculate effect size using Cohen