Homework Answers
TOPIC:Between the groups degrees of freedom in ANOVA.
Add Answer to:
Question 3 10 pts Use the following information for questions 3 - 10 The table below...
(2 pts) Consider the test of the claims that the two samples described below come from...
(2 pts) Consider the test of the claims that the two samples described below come from two populations whose means are equal vs. the alternative that the population means are different. Assume that the samples are independent simple random samples and that both populations are approximately normal with equal variances. Use a significance level of α-0.01 Sample 1: ni - 17, x1- 21, s1 10 Sample 2: n2 -4, x2-29, s2 -5 (a) Degrees of freedom - (b) The test...
Help with these questions related to statistics! Select the statements that are always true about two...
Help with these questions related to statistics!
Select the statements that are always true about two sample t-tests: If the populations are assumed to have unequal variances, we use Welch's t-test It is not required for the two samples to be independent The sample sizes do not have to be equal 0 0 0 If the populations are assumed to have equal variances, we use Welch's t-test If the p-value from our test is .03, the null hypothesis should be...
Suppose you are performing a one-way ANOVA with only the information given in the following table....
Suppose you are performing a one-way ANOVA with only the information given in the following table. Sources of Variation Degrees of Freedom Sum of Squares Between 4 200 Within 45 3547 Thep-value for the test of the equality of the means of all populations is calculated to be0.6406. Suppose you plan to increase the sample sizes for all groups but keep them all equal. However, when you do this, the sum of squares within samples and the sum of squares...
Please help with the following multiple choice 1. In the one-way ANOVA where there are k...
Please help with the following multiple choice 1. In the one-way ANOVA where there are k treatments and n observations, the degrees of freedom for the F-statistic are equal to, respectively: a. n and k. b. k and n. c. n − k and k − 1. d. k − 1 and n − k. 2. In ANOVA, the F-test is the ratio of two sample variances. In the one-way ANOVA (completely randomized design), the variance used as a numerator...
Random samples that are drawn independently from two normally distributed populations yielded the following statistics. Group...
Random samples that are drawn independently from two normally distributed populations yielded the following statistics. Group 1 Group 2 - 10 ny = 15 *, -276.3 72 - 2628 2745.76 3 - 625 (The first row gives the sample sizes, the second row gives the sample means, and the third row gives the sample variances.) Can we conclude, at the 0.01 significance level, that the two population variances, o and a differ? Perform a two-tailed test. Then fill in the...
The following information was obtained from independent random samples. Assume normally populations with equal Sample 1...
The following information was obtained from independent random samples. Assume normally populations with equal Sample 1 Sample 2 12 Sample Size 10 Sample Mean 52 Sample Variance 85 We are interested in testing Hai sample 1 -Hsample 2 0 Step 2 of 3: Determine the p-value for the test. TablesKeypad Answer 1 Point Next Prev O p-value c 0.025 0.025< p-value <0.05 Op-value <0.1 。p-value > 0.2 None of the above o 2019 8 3 of 3 The following information...
Two samples each of size 20 are taken from independent populations assumed to be normally distributed...
Two samples each of size 20 are taken from independent populations assumed to be normally distributed with equal variances. The first sample has a mean of 43.5 and a standard deviation of 4.1 while the second sample has a mean of 40.1 and a standard deviation of 3.2. A researcher would like to test if there is a difference between the population means at the 0.05 significance level. What can the researcher conclude? There is not sufficient evidence to reject...
QUESTION 7 The following data are taken from three different populations known to be normally distributed,...
QUESTION 7 The following data are taken from three different populations known to be normally distributed, with equal population variances based on independent simple random samples. Sample 1 Sample 2 Sample 3 39 40 43 37 38 50 35 33 42 45 35 54 37 30 48 30 52 Given that one-way ANOVA was performed and we reject the null hypothesis, please use Tuley's test to determine which pairwise means differ using a familywise error rate of a -0.05. 22...
Consider the following summary statistics, calculated from two independent random samples taken from normally distributed populations....
Consider the following summary statistics, calculated from two independent random samples taken from normally distributed populations. Sample 1 Sample 2 x¯1=20.92 x¯2=26.80 s21=2.89 s22=3.81 n1=19 n2=15 Test the null hypothesis H0:μ1=μ2against the alternative hypothesis HA:μ1<μ2. a) Calculate the test statistic for the Welch Approximate t procedure. Round your response to at least 3 decimal places. b) The Welch-Satterthwaite approximation to the degrees of freedom is given by df = 27.983055. Using this information, determine the range in which the p-value...
Please answer all 9 questions Question 1 (6 points) Two college instructors are interested in whether...
Please answer all 9
questions
Question 1 (6 points) Two college instructors are interested in whether or not there is any variation in the way they grade math exams. They each grade the same set of 10 exams. The first instructor's grades have a variance of 59.2. The second instructor's grades have a variance of 72.5. Test the claim that the first instructor's variance is smaller. (In most colleges, it is desirable for the variances of exam grades to be...
(2 pts) Consider the test of the claims that the two samples described below come from two populations whose means are equal vs. the alternative that the population means are different. Assume that the samples are independent simple random samples and that both populations are approximately normal with equal variances. Use a significance level of α-0.01 Sample 1: ni - 17, x1- 21, s1 10 Sample 2: n2 -4, x2-29, s2 -5 (a) Degrees of freedom - (b) The test...
Help with these questions related to statistics!
Select the statements that are always true about two sample t-tests: If the populations are assumed to have unequal variances, we use Welch's t-test It is not required for the two samples to be independent The sample sizes do not have to be equal 0 0 0 If the populations are assumed to have equal variances, we use Welch's t-test If the p-value from our test is .03, the null hypothesis should be...
Random samples that are drawn independently from two normally distributed populations yielded the following statistics. Group 1 Group 2 - 10 ny = 15 *, -276.3 72 - 2628 2745.76 3 - 625 (The first row gives the sample sizes, the second row gives the sample means, and the third row gives the sample variances.) Can we conclude, at the 0.01 significance level, that the two population variances, o and a differ? Perform a two-tailed test. Then fill in the...
The following information was obtained from independent random samples. Assume normally populations with equal Sample 1 Sample 2 12 Sample Size 10 Sample Mean 52 Sample Variance 85 We are interested in testing Hai sample 1 -Hsample 2 0 Step 2 of 3: Determine the p-value for the test. TablesKeypad Answer 1 Point Next Prev O p-value c 0.025 0.025< p-value <0.05 Op-value <0.1 。p-value > 0.2 None of the above o 2019 8 3 of 3 The following information...
Two samples each of size 20 are taken from independent populations assumed to be normally distributed with equal variances. The first sample has a mean of 43.5 and a standard deviation of 4.1 while the second sample has a mean of 40.1 and a standard deviation of 3.2. A researcher would like to test if there is a difference between the population means at the 0.05 significance level. What can the researcher conclude? There is not sufficient evidence to reject...
QUESTION 7 The following data are taken from three different populations known to be normally distributed, with equal population variances based on independent simple random samples. Sample 1 Sample 2 Sample 3 39 40 43 37 38 50 35 33 42 45 35 54 37 30 48 30 52 Given that one-way ANOVA was performed and we reject the null hypothesis, please use Tuley's test to determine which pairwise means differ using a familywise error rate of a -0.05. 22...
Please answer all 9
questions
Question 1 (6 points) Two college instructors are interested in whether or not there is any variation in the way they grade math exams. They each grade the same set of 10 exams. The first instructor's grades have a variance of 59.2. The second instructor's grades have a variance of 72.5. Test the claim that the first instructor's variance is smaller. (In most colleges, it is desirable for the variances of exam grades to be...
Most questions answered within 3 hours.
-
In your opinion, did anyone "win" the Cold War? If no, why? If
yes, who won...
asked 4 minutes ago -
a) Determine the saturation dissolved oxygen concentration at
sea-level at 1 atm and 20° C in...
asked 1 minute ago -
Please complete the implementation of the four functions IN
C.
//************************************************************************************/
//
// countNumberofOnes
//
//...
asked 4 minutes ago -
Shown below are the budgeted sales for ABC Company for
the next six months:
Sales...
asked 8 minutes ago -
A balance sheet shows exactly where a business stands at any
given point in time. It...
asked 9 minutes ago -
For the reaction between ethylene and chlorine, the equilibrium
constant is 2.00x10^6. If the initial concentrations...
asked 16 minutes ago -
What is the energy released in this β+ nuclear reaction
23/12Mg→23/11Na+0/1e (The atomic mass of 23Mg...
asked 31 minutes ago -
Choose one:
Periodic Inventory Accounting is less expensive to maintain
than Perpetual Inventory Accounting
Periodic Inventory...
asked 28 minutes ago -
4. Describe the role played by glutamine in the transport of
nitrogen.
asked 27 minutes ago -
1. In IntelliJ create a new project called F1_2
2. In the Project window create a...
asked 32 minutes ago -
30 mL of 1 M HCl were added to 200 mL of 0.1 M lysine solution...
asked 40 minutes ago -
The market portfolio has an expected return of 9.2% with a
volatility of 16.7% while the...
asked 44 minutes ago