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
This statement is True as paired t test analysis is done on the data of differences from pairs.
Original pairs of scores are first reduced to difference scores before computing the test statistic for the related samp...
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 14 What is the paired-samples t test statistic for the following difference scores:-2.-19, +17, -22, -67 -6.40 -0.92 O 6.96 O 15.57
A researcher conducts a study in which the population variance of difference scores between two groups is unknown. What type of t-test is most appropriate for this study? Question 6 options: one–independent sample t-test two–independent sample t-test related samples t-test There is not enough information to answer this question.
1. If one wants to test whether there is a difference in mean scores before and after an exam, which will be an appropriate test to use? a) one sample z test b) one sample t test c) paired t test d) two sample independent t test
True or False? when sample data occurs in pairs, an advantage of choosing a paired t-test is that it tends to increase the power of a test, as compared to treating each sample independently. True or False? When testing the difference between two population proportions, it is necessary to use two samples with the same sample size. True or False? If the sample proportions are p1=6/90 and p2=4/100, we can assume normality for the two sample proportions in a test...
True or False 4. The formula used in repeated-measures t statistic Is used with a matched-subjects design even though the design uses two separate samples. .One advantage of a repeated-measures design is that it typically requires owa nts than an independent-measures design. When computing difference scores' (D values) the sign of the difference(+or-'s not nt. You need to record only the size of the difference. Power is 14. To get a big effect size, you should increase N. Power analysis...
QUESTION 11 You run an independent samples t-test between two groups, and find a t-statistic of t=1.67. Is this sufficient to reject the null hypothesis? Assume α=0.05 and a one-sided test. Yes, > 1.67 is sufficient to reject the null. No, > 1.67 is not sufficient to reject the null. Not enough information. 2 points QUESTION 12 In a dependent samples t-test, the sample sizes must be equal. True False 2 points QUESTION 13 In an independent samples...
If one wants to test whether there is a difference in mean scores before and after an exam, which will be an appropriate test to use? a) one sample z test b) one sample t test c) paired t test d) two sample independent t test If X is a random variable following a Uniform(a,b) distribution, which option represents an approxi- mate shape of its density function? a) straight vertical line between a and b b) straight horizontal line between...
*Calculating the RELATED-samples t-statistic' [15 points Assignment #12 df=7 PROBLEM: A Qwest customer would like to determine if their internet service will actually download files faster if they have the Turbo-Download Boost (TDB) feature turned on. The customer uses the same PC to download the same exact files from the same exact location on the web, first using their internet service with the TDB on, and then with the TDB turned off The data show the number of minutes required...
Question 8 2 pts When calculating a t-test statistic in a hypothesis test, it is based on information obtained only from the population. True False Question 9 2 pts A continuous normal distribution has the same probability at each individual value of X. True False Question 10 2 pts Confidence intervals and hypothesis testing are examples of how a researcher performs inferential statistics. True False