# Results for: test-for-equality-of-variance

### An analysis of variance differs from a t test for independent means in that an analysis of variance?

Analysis of Variance (ANOVA) compares 3 or more means. The t-test would only compare 2 means. Full Answer

### What is the F stat in regression analysis?

The F stat tests the equality of variances. It uses statistical tables for reference and is calculated with F = Variance 1 (max)/variance 2(min). Full Answer

### Example of parametric test?

The Fisher F-test for Analysis of Variance (ANOVA). Full Answer

### Define error variance-?

Error variance is the component of a test score attributable to sources other than the trait or ability measured. Full Answer

### Does standard deviation effect the alpha level?

Yes. For some tests, such as the Fisher F-test, the test statistic is an estimate of the variance. If the alpha level was not affected, the test would be no use at all! Full Answer

### When do you run a post-hoc test?

When you need to find equal variance. Full Answer

### Why is variance important when using statistics?

Variance is basically the raw material of statistics. If you don't have variance (differences in scores) you don't have much to work with or for that matter you don't have much to talk or think about. Consider a test where… Full Answer

### When do you use a z-value rejection region when testing a claim about a population mean?

If you know the population variance or if you have a very large sample then you could reliably use a Z test. Otherwise you should use a t test and use s^2 as an estimator for the population variance. Full Answer

### When it comes to comparing data from different distributions what is the benefit of normal standard distribution?

There may or may not be a benefit: it depends on the underlying distributions. Using the standard normal distribution, whatever the circumstances is naive and irresponsible. Also, it depends on what parameter you are testing for. For comparing whether or… Full Answer

### What are t test and F test In which situation these are applied?

Both are parametric test. The t-test uses a test statistic that is related to the sample mean(s) and is used to compare that with the mean of another sample or some population. The F-test uses a test statistic that is… Full Answer

### What are the variances in a 4 variance analysis?

efficiency variance, spending variance, production volume variance, variable and fixed components Full Answer

### What factors causes Budget Variance?

There are 7 variances associated with a budget ( which are generally calculated for controlling purposes) 1- Material Price variance 2- Material Quantity variance 3- Labor rate variance 4- Labor efficiency variance 5- Spending variance 6- Efficiency variance 7- Capacity… Full Answer

### What is the difference between negative price variance and volume variance?

Negative price variance is when the cost is less than budgeted. Volume variance is a variance in the volume produce. Full Answer

### What is one way Anova used to test?

One-Way ANOVA is used to test the comparison of 3 or more samples alleviating the risk of having a wrong answer in doing each test separately. ANOVA is an acronym for ANalysis Of VAriance Full Answer

### What is a turkey Kramer test?

I think you mean a Tukey-Kramer test. The spelling is important. The answer to "What is a Tukey-Kramer test" can be found on Wikipedia. Briefly, after you have applied an analysis of variance, it is a method of dissecting the… Full Answer

### What is the variance used for?

Variance is used to add standard deviations when comparing two samples or populations.Variance is simply Std^2.The formula for obtaining Std is dependent on the type of sample taken\ hypothesis test performed i.e. 2-proportion pop/sample, single proportion, poussin, binomial, etc. Full Answer

### When do you use an F test?

When testing the sums of squares of variables which are independently identically distributed as normal variables. One of the main uses of the F-test is for testing for the significance of the Analysis of Variance (ANOVA) or of covariance. Full Answer

### What is Proportion of variance unaccounted?

The unaccounted for variance aka Error Variance, is the amount of variance of the dependent variable (DV) that is not accounted for by the main effects/independent variables (IV) and their interactions. Full Answer

### Can variance be negative?

Since Variance is the average of the squared distanced from the mean, Variance must be a non negative number. Full Answer

### Write a program to find whether two strings are equal or not?

There are two different types of equality for Strings - object equality (==) and comparative (compareTo(), equals()). Object equality compares the memory addresses of two Strings, which is probably not what you are looking for. To test for equality, you… Full Answer

### What values can variance not equal in math?

Variance cannot be negative. Full Answer

### What is the sample variance of 5781010 and 14?

The variance is: 1.6709957376e+13 Full Answer