Question

There were two separate children samples who were taught history in two different way, one is...

  1. There were two separate children samples who were taught history in two different way, one is traditional using only blackboard the other one using different methods of teaching history including videos. The first sample has n = 10 with SS = 450 where the second sample has n = 4 and a SS = 230.
  1. Calculate the pooled variance for both samples.
  2. If the sample mean difference is 6 point, do you have the enough information for rejecting the null hypothesis for a two tailed test with α = .5 ?
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Edith Educationer is analyzing the test scores for Calculus students taught using two different methods: a...
Edith Educationer is analyzing the test scores for Calculus students taught using two different methods: a traditional method, and a web-based, self-paced method.  She feels that the traditional method is better suited for teaching Calculus.  Run a hypothesis test at α = 0.05, to determine if the test scores in the traditional method are higher. Conduct a hypothesis test, using the traditional method, and provide all 5 steps to your hypothesis test. Traditional Web-based, Self-paced Mean Test Score X1=87 X2=80 Population Variance...
Beginning readers are assigned at random to be taught reading by two different methods. After a...
Beginning readers are assigned at random to be taught reading by two different methods. After a year, all the children are given the same test of reading achievement. The results for the two samples are tabled below (higher numbers indicate better performance). Estimate the magnitude of the effect of Method. State your result in English. Get the 95% confidence interval to estimate the mean difference between the 2 methods and state your outcome in English. Based on your confidence interval,...
Choose the BEST method for the situation: Two different methods of teaching number division in two...
Choose the BEST method for the situation: Two different methods of teaching number division in two respective samples of elementary school students were compared using a test of division ability, which was administered at the end of the study. In addition, the children were also measured at the beginning of the study on an intelligence test yielding an intelligence score. You want to know if there are differences between the two methods using the data that you have collected.   ANCOVA...
Two teaching methods and their effects on science test scores are being reviewed. A random sample...
Two teaching methods and their effects on science test scores are being reviewed. A random sample of 11 students, taught in traditional lab sessions, had a mean test score of 76.7 with a standard deviation of 3.2. A random sample of 16 students, taught using interactive simulation software, had a means test score of 83.2 with a standard deviation of 6.4. Do these results support the claim that the mean science test score is different for students taught in traditional...
One sample has n = 20 with SS = 1640, and a second sample has n...
One sample has n = 20 with SS = 1640, and a second sample has n = 15 with SS = 1724. (a) Find the pooled variance for the two samples. (Use 3 decimal places.) (b) Compute the estimated standard error for the sample mean difference. (Use 3 decimal places.) (c) If the sample mean difference (M1 - M2) is 6 points, is this enough to reject the null hypothesis and conclude that there is a significant difference for a...
One sample has SS = 44 and a second sample has SS = 40. Let's say...
One sample has SS = 44 and a second sample has SS = 40. Let's say that n = 8 for both samples. If we were to calculate the the two sample variances, they would be: s12 = 6.286 and s22 = 5.714. (a) Calculate 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. (Use 3 decimal places.) sp2 = Now assume that n1...
Three separate random samples of students (one sample selected from each of three different colleges) were...
Three separate random samples of students (one sample selected from each of three different colleges) were selected in order to estimate the population percentage of students at each college who are sophomores. Sample 1: 120 students were selected from among all those attending college number 1 and 30 of them were found to be sophomores. Sample 2: 65 students were selected from among all those attending college number 2 and 10 of them were found to be sophomores. Sample 3:...
One sample has n = 18 with SS = 5,471, and a second sample has n...
One sample has n = 18 with SS = 5,471, and a second sample has n = 18 with SS = = 5,545. Find the pooled variance for the two samples. S2p = ________ Compute the estimated standard error for the sample mean difference. S(m1-m2) = ___________ If the sample mean difference is 12.00 points, is this enough to reject the null hypothesis and conclude that there is a significant difference for a two-tailed test at the .05 level? (Use...
For each of the following samples that were given an experimental​ treatment, test whether the samples...
For each of the following samples that were given an experimental​ treatment, test whether the samples represent populations that are different from the general​ population: (a) a sample of 11 with a mean of 46​, ​(b) a sample of 1 with a mean of 53. The general population of individuals has a mean of 43​, a standard deviation of 7​, and follows a normal curve. For each​ sample, carry out a Z test using the five steps of hypothesis testing...
(a) Two separate direct shear tests were conducted on soil samples with the shear box having...
(a) Two separate direct shear tests were conducted on soil samples with the shear box having dimensions of 80 mm × 80 mm on plan view. Assuming this cross-sectional area remains unchanged, determine the cohesion intercept (c’) and friction angle (φ’) of the soil based on the following results obtained at failure. Direct shear test results Test Normal force (N) Shear force (N) 1 210 257 2 360 372 (b) A CU triaxial test was conducted on a specimen of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT