Use the Excel printout to answer the following questions.**t-Test: Two-Sample Assuming Equal Variances**| | F | G ||----------|-----------|-----------|| | Variable 1| Variable 2|| Mean | 28.671 | 28.215 || Variance | 5.061 | 2.225 || Observations | 8 | 7 || Pooled Variance | 3.752 | || Hypothesized Mean Difference | 0 | || df | 13 | || t Stat | 0.455 | || P(T <= t) one-tail | 0.328 | || t Critical one-tail | 1.771 | || P(T <= t) two-tail | 0.657 | || t Critical two-tail | 2.160 | |**In testing for a difference between the two population means, would you conclude that the assumption of a common variance is reasonable?**- [ ] Yes, the ratio of the larger variance to the smaller variance is less than three.- [ ] Yes, the ratio of the larger variance to the smaller variance is more than three.- [ ] No, the ratio of the larger variance to the smaller variance is less than three.- [ ] No, the ratio of the larger variance to the smaller variance is more than three.- [ ] It is not possible to check that assumption with the given information.**What is the observed value of the test statistic?**t = _______**What are the degrees of freedom for the pooled estimate of the population variance?**df = _______**What is the p-value of the test?**p-value = _______**What can you conclude concerning the null hypothesis in this case if α = 0.05?**- [ ] Since the p-value is greater than 0.05, the results are significant. There is sufficient evidence to indicate a difference in the two population means.- [ ] Since the p-value is less than 0.05, the results are significant. There is sufficient evidence to indicate a difference in the two population means.- [ ] Since the p-value is greater than 0.05, the results are not significant. There is insufficient evidence to indicate a difference in

Test is that whether there is a difference between the population means. Level of significance =…

Answered: In testing for a difference between the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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What is Ha? (H0 is the mean VIQ scores for the younger, middle-aged, and older subjects are all not different from each other) (Note: 1= 5-25 Years, 2= 26-59 Years, 3= 60-92 Years) Multiple Choices: 1. H0 is not true 2. The mean VIQ scores for the younger, middle-aged, and older subjects 3. are all different 4. The mean VIQ scores for the younger, middle-aged, and older subjects are all different from each other 5. The mean VIQ scores for the younger, middle-aged, and older subjects are not equal to one another 6. The mean VIQ scores for the younger, middle-aged, and older subjects are not the same as each other
The need to validate the result of any research study is to make sure the groups or participants are in accord when it comes to results. What are some examples of threats to the validity? Would it be what is called confound and error variance. Is confounding when a problem affects one group and not the other group. Does error variance affect one group more than the other group?
A factor in determining the usefulness of an examination as a measure of demonstrated ability is the amount of spread that occurs in the grades. If the spread or variation of examination scores is very small, it usually means that the examination was either too hard or too easy. However, if the variance of scores is moderately large, then there is a definite difference in scores between "better," "average," and "poorer" students. A group of attorneys in a Midwest state has been given the task of making up this year's bar examination for the state. The examination has 500 total possible points, and from the history of past examinations, it is known that a standard deviation of around 60 points is desirable. Of course, too large or too small a standard deviation is not good. The attorneys want to test their examination to see how good it is. A preliminary version of the examination (with slight modifications to protect the integrity of the real examination) is given to a random sample of…
solve a and b
3. The pooled variance is a function of the sample variances. O True O False
A factor in determining the usefulness of an examination as a measure of demonstrated ability is the amount of spread that occurs in the grades. If the spread or variation of examination scores is very small, it usually means that the examination was either too hard or too easy. However, if the variance of scores is moderately large, then there is a definite difference in scores between "better," "average," and "poorer" students. A group of attorneys in a Midwest state has been given the task of making up this year's bar examination for the state. The examination has 500 total possible points, and from the history of past examinations, it is known that a standard deviation of around 60 points is desirable. Of course, too large or too small a standard deviation is not good. The attorneys want to test their examination to see how good it is. A preliminary version of the examination (with slight modifications to protect the integrity of the real examination) is given to a random sample of…
hey how would i do this?
A factor in determining the usefulness of an examination as a measure of demonstrated ability is the amount of spread that occurs in the grades. If the spread or variation of examination scores is very small, it usually means that the examination was either too hard or too easy. However, if the variance of scores is moderately large, then there is a definite difference in scores between "better," "average," and "poorer" students. A group of attorneys in a Midwest state has been given the task of making up this year's bar examination for the state. The examination has 500 total possible points, and from the history of past examinations, it is known that a standard deviation of around 60 points is desirable. Of course, too large or too small a standard deviation is not good. The attorneys want to test their examination to see how good it is. A preliminary version of the examination (with slight modifications to protect the integrity of the real examination) is given to a random sample of…
Is the variance for the amount of money, in dollars, that shoppers spend on Saturdays at the mall the same as the variance for the amount of money that shoppers spend on Sundays at the mall? Saturday Sunday Saturday Sunday 75 44 62 137 18 58 0 82 150 61 124 39 94 19 50 127 62 99 31 141 73 60 118 73 89 What is the null hypothesis? What is the alternative hypothesis? What is the degrees of freedom (numerator)? What is the degrees of freedom (denominator)? What is the f statistic? What is the result? What is the p-value? Conclusion?
If I roll two six-sided dice, what is the mean and variance of their difference? (note, the difference of 3 and 1 is 3 - 1 = 2, but the difference of 1 and 3 is 1-3 = -2) a) What is the mean? (express as an integer or reduced fraction) Reduce your answer to lowest terms. b) What is the variance? (express as an integer or reduced fraction) Reduce your answer to lowest terms. Submit part

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