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, 6.00,12.00)
Now assume that n=4 for the first sample and n=7 for
the second. Agsin
calculate the two sample variances and the pooled variance. You
should find that the pooled variance is closer to the variance for
the larger sample.
The first sample has s^2=______(6.00,12.00, 9.00,3.00),and the second has s^2=________(3.00,6.00,4.50, 12.00). The pooled variance is s^2p=_______(9.00,3.00,12.00,6.00)
The ss of the two samples are: and with .
Their variance can be calculated as -
and
The pooled variance is
which is equal to , i.e. the pooled variance is halfway between the two sample variances.
Now, for the given ss of the two samples : and with .
Their variance can be calculated as -
and
The pooled variance is
which is closer to , i.e. the pooled variance is closer to variance of the first (larger) sample.
one sample has ss=36 and a second sample has ss=18 If n=4 for both samples, find...
1. You have an independent-measures study where your first sample has an SS = 36 and your second sample has an SS = 24. a. If your sample size for both samples is n = 5, find the sample variances and compute the pooled variance. b. On the other hand, if your samples have difference sample sizes, n1 = 5 and n2 = 13. Again, calculate the two sample variances and your pooled variance. c. Compare your answers from part...
22. One sample has M 18 and a second sample has M 14. If the pooled variance for the two samples is 16, then what is the value of Cohen's d? a. 0.25 b. 0.50 1.00 d. this cannot be determined with the info Given
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...
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To An independent-measures t hypothesis test is appropriate when the value for a is known a. b. the mean for a treated group of subjects is compared to a known population mean C. one sample is used to test a hypothesis about one population P there are two separate samples containing different subjects 17. One sample of n 5 scores has a variance of s 10 and a second sample of n= 10 scores has s pooled variance is computed...
3. You have two independent random samples: XiXX from a population with mean In and variance σ2 and Y, Y2, , , , , Y,n from a population with mean μ2 and variance σ2. Note that the two populations share a common variance. The two sample variances are Si for the first sample and Si for the second. We know that each of these is an unbiased estimator of the common population variance σ2, we also know that both of...
Are my answers correct? 2. Gravetter/Wallnau/Forzano, Essentials - Chapter 10 - End-of-chapter question 6 Two separate samples receive different treatments. After treatment, the first sample has n = 6 with SS = 236, and the second has n = 12 with SS = 340. The pooled variance for the two samples is 36.00 . Compute the estimated standard error for the sample mean difference. Estimated S(M1 - M2) = 3.00 If the sample mean difference is 7 points, is this...
Question 6 5 pts A sample of n = 4 scores with SS = 48 has a variance of s = 16 and an estimated standard error of 2. True O False
One sample has a mean of M = 6 and a second sample has a mean of M = 12. The two samples are combined into a single set of scores. (b) What is the mean for the combined set if the first sample has n = 4 scores and the second sample has n = 8? (c) What is the mean for the combined set if the first sample has n = 8 scores and the second sample has...
1. 2. 3. Which of the following sets of sample data would produce the largest value for an independent-measures t statistic. Assume that n = 10 for all samples. Note: You should not need to do any serious calculations to answer this question. First sample: M 30 and SS 10, Second Sample: M 35 and SS 10 ● First sample : M = 30 and SS = 50, Second Sample: M = 35 and SS = 50 O First sample:...