have a similar amount of variance within each group being compared (a.k.a. homogeneity of variance) All T-Rocs have an automatic emergency braking ( AEB)system that can detect pedestrians as well as other cars, and lane-keeping assistance. Style trim and upwards will sound an alert if the driver is tired. A t-test is an inferential statistic used to determine if there is a statistically significant difference between the means of two variables. If you want to know whether one population mean is greater than or less than the other, perform a one-tailed t test.

A t-test measures the difference in group means divided by the pooled standard error of the two group means.

When reporting your t test results, the most important values to include are the t value, the p value, and the degrees of freedom for the test. These will communicate to your audience whether the difference between the two groups is statistically significant (a.k.a. that it is unlikely to have happened by chance). If the groups come from a single population (e.g., measuring before and after an experimental treatment), perform a paired t test. This is a within-subjects design. The T' is another term for 'the Truth.' The term was popularized in gay culture. 'The T' was brought mainstream by RuPaul's Drag Race, TV, series, as the Drag Queens, and Drag Racers (series viewers) would refer to 'The T' when speaking the Truth. begin{aligned}&\text{T-value} = \frac{ mean1 - mean2 }{\frac {(n1 - 1) \times var1

RuPaul was preaching the T when she said, If you can't love yourself how the hell you gonna love anyone else.You can also include the summary statistics for the groups being compared, namely the mean and standard deviation. In R, the code for calculating the mean and the standard deviation from the data looks like this: The p value: 2.2e-16 (i.e. 2.2 with 15 zeros in front). This describes the probability that you would see a t value as large as this one by chance. A large t-score, or t-value, indicates that the groups are different while a small t-score indicates that the groups are similar.