What is the pooled variance for the following two samples? Sample 1: n=8 and s2=168 Sample...
for 2 independent samples..what is the rule for eyeballing the variance to choose either the pooled or unpooled method. given a sample 1 variate equal 2699 and sample 2 variation of 3834. which variance method to use?
one sample has ss=36 and a second sample has ss=18 If n=4 for both samples, find each of the sample variances and compute the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances. The first sample has ________ (choose one of the following 12.00, 9.00, 6.00, 3.00), and the second has s^2=______((choose one of the folloeing 12.00, 6.00, 3.00, 4.50). The pooled variance is s^2p=________(9.00,...
A researcher has two samples of participants, and each sample experiences a different level of the independent variable. Sample A has 8 participants and Sample B has 10 participants. The corrected variance for Sample A is 7.71 and the corrected variance for Sample B is 9.34. What is the pooled degrees of freedom between the 2 samples? (hint: you shouldn’t use the pooled variance equation). Find the pooled variance using the pooled variance equation. Convert the pooled variance to variance...
A researcher has two samples of participants, and each sample experiences a different level of the independent variable. Sample A has 8 participants and Sample B has 10 participants. The corrected variance for Sample A is 7.71 and the corrected variance for Sample B is 9.34. What is the pooled degrees of freedom between the 2 samples? (hint: you shouldn’t use the pooled variance equation). Find the pooled variance using the pooled variance equation. c . Add the two variance...
when variances between two samples are not equal in a paired sample t test, the pooled variance must be computed and used 8n place of the estimated standard error. t or f
Calculate the pooled variance (as in an independent-Measures t test for the following sample. Round to two decimal places. Treatment Treatment A B 12 8 8 9 12 15 16 17 4 5 17 18 17 13 6 3
Question We are doing a two-mean pooled t-test. We have two samples with sizes n = 13 and n2 = 24. The population standard deviations are unknown but assumed to be equal, so we find the sample standard deviations and use them to calculate a pooled standard deviation, Sp- • For sample 1: S1 = 9.4 and 1 = 47 • For sample 2: s2 = 8.7 and iz = 44 What are the test statistic (I) and the degrees...
Question 16 1 pts You have data from two simple random samples: Group 1 Group 2 Sample Mean 4 6 Sample Variance 3 8 Sample Size 6 8 What is the pooled variance? If necessary, round your answer to four decimal places.
14. (4 points) Given the following information, caleulate Sg, the pooled sample variance that should be used in the pooled-variance t test 416 6,25 C.S:-4 D.sg-5.23 А.sg-6 B.sj-5 15. (5 points) If standard deviation σ is unknown, the population is normally distributed, and the sarmple size n is small. What kind of confidence interval should we use for population mean μ?
1. 2. 3. Assuming that other factors are held constant, which of the following would tend to increase the likelihood of rejecting the null hypothesis? Decrease the sample size Increase the sample mean difference Increase the sample variance None of the other 3 options would increase the likelihood Which of the following is the correct null hypothesis for a repeated-measures t test? MD 0 M1 M2 One sample of n=8 scores has a variance of s 6 and a second...