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In statistics, the t-test is a measure of the probability of a particular event happening. It is based upon a normal (bell-shaped curve) distribution of probabilities.
A negative number result for a t-test indicates that the probability calculated is to the left if you are graphing it on the bell curve. Importantly, it does not indicate a "less than zero" chance of an event happening.
What else can I help you with?
What does a negative f statistic mean?
the populations have an excess of heterozygotes
What is downside probability?
This is a very simple statistic to comprehend and to calculate. It takes the frequency distribution method of calculating probability. The statistic is calculated as This statistic is simple to interpret as well. What it calculates is the probability of the portfolio to get a negative return. It can be comprehended that a higher figure would mean a higher probability of fund to do give negative returns.
What does a high t-statistic mean?
A high z-score (or t-score, depending on what info you've been given for the data) means that a number is very far away from the mean (average) number. This number might be an outlier.
Can the f statistic be negative?
No, the F statistic cannot be negative. The F statistic is derived from the ratio of variances, specifically the variance between groups divided by the variance within groups. Since variances are always positive or zero, the resulting F statistic will also be zero or positive.
What is the p value of a test statistic of 1.369?
The answer depends on what the test statistic is: a t-statistic, z-score, chi square of something else.
What happen if t stat is negative?
A negative t-statistic indicates that the sample mean is less than the hypothesized population mean in a t-test. This suggests that the effect being measured is in the opposite direction than expected, which could imply a decrease or a negative relationship. The interpretation of the results will depend on the context of the hypothesis being tested, and it is important to consider the significance level to determine if the result is statistically significant.
What does a negative f statistic mean?
the populations have an excess of heterozygotes
On average what value is expected for the t statistic when the null hypothesis is true?
When the null hypothesis is true, the expected value for the t statistic is 0. This is because the t statistic is calculated as the difference between the sample mean and the hypothesized population mean, divided by the standard error, and when the null hypothesis is true, these values should be equal, resulting in a t statistic of 0.
What is a negative statistic?
a statistic that is not in youre favor
What are the example of inferential statistics?
Mean, variance, t-statistic, z-score, chi-squared statistic, F-statistic, Mann-Whitney U, Wilcoxon W, Pearson's correlation and so on.
How do you interpret a negative z- score?
A negative z-score indicates that the observed value (or statistic) was below the mean. In non-directional tests, a negative z-score is just as likely as a positive one.
What is downside probability?
This is a very simple statistic to comprehend and to calculate. It takes the frequency distribution method of calculating probability. The statistic is calculated as This statistic is simple to interpret as well. What it calculates is the probability of the portfolio to get a negative return. It can be comprehended that a higher figure would mean a higher probability of fund to do give negative returns.
What are some factors influencing the numerator and denominator t-statistic?
Several factors influence the value obtained for a t statistic. Some factors affect the numerator of the t statistic and others influence the size of the estimated standard error in the denominator. For each of the following, indicate whether the factor influences the numerator of dominator of the t statistic and determine whether the effect would be to increase the value of t (farther from zero) or decrease the value of t (closer to zero). In each case, assume that all other factors remain constant. a. Increase the variability of the scores. b. Increase the number of scores in the sample. Increase the difference between the sample mean and the population mean.
What does the c and the t mean on a hospital pregnancy test?
C- Control T- means test Line under the C - Negative Line under C and T- positive :)
When the null hypothesis is true the t statistic will have an average value of?
"Whenever the t-statistic is farther from 0 than the t-critical value, the null hypothesis is rejected; otherwise, the null hypothesis is retained" Example: t = (M-μ0)/ (SD / Sqrt N) M is the sample mean and μ0 is the hypothetical mean. For a paired-samples t-test, M is the mean of the difference scores and μ0 is 0. SD is the standard deviation (of the difference scores in the case of a paired-samples t-test) and N is the number of subjects in the sample.
What does a high t statistic mean?
Assuming you mean the t-statistic from least squares regression, the t-statistic is the regression coefficient (of a given independent variable) divided by its standard error. The standard error is essentially one estimated standard deviation of the data set for the relevant variable. To have a very large t-statistic implies that the coefficient was able to be estimated with a fair amount of accuracy. If the t-stat is more than 2 (the coefficient is at least twice as large as the standard error), you would generally conclude that the variable in question has a significant impact on the dependent variable. High t-statistics (over 2) mean the variable is significant. What if it's REALLY high? Then something is wrong. The data points might be serially correlated. Assuming you mean the t-statistic from least squares regression, the t-statistic is the regression coefficient (of a given independent variable) divided by its standard error. The standard error is essentially one estimated standard deviation of the data set for the relevant variable. To have a very large t-statistic implies that the coefficient was able to be estimated with a fair amount of accuracy. If the t-stat is more than 2 (the coefficient is at least twice as large as the standard error), you would generally conclude that the variable in question has a significant impact on the dependent variable. High t-statistics (over 2) mean the variable is significant. What if it's REALLY high? Then something is wrong. The data points might be serially correlated.
What set of sample characteristics is most likely to produce a significant t statistic?
a small mean difference and large sample variances
