‘t’ is the test statistic or t-value. The formula is a ratio, and it is also called asignal-to-noise ratio. Signal The signal is the numerator. It is the difference between the sample mean and the null hypothesis value. If the difference is zero, the entire ratio becomes zero. The...
The RPIX was the UK’s lead inflation index until 2003, when it was replaced by the CPI. The RPI and the CPI are calculated differently, using different methods of calculating average prices, as well as different formulae. The ONS believes that the RPI isn’t a great statistic, because...
The goal of statistics is not to perform numerous calculations using the formulas, but to gain an understanding of your data. The calculations can be done using a calculator or a computer. The understanding must come from you. If you can thoroughly grasp the basics of statistics, you...
in a chi-square analysis, if the obtained chi-square value is greater than the critical chi-square value, what do you do? The degrees of freedom for a chi-square goodness-of-fit test are : A) k - 1 B) n - 1 C) (k1 - 1)(k2 - 1) D) (k - 1)(n - 1) ...
If a test shows a .06 probability, it means that it has a 94% chance of being true. You can't be quite as sure about it as if it had a 95% chance of being be true, but the odds still are that it is true. The 95% level comes from academic publications, where a theory ...
Graphically, the p value is the area in thetailof aprobability distribution. It’s calculated when you run hypothesis test and is the area to the right of thetest statistic(if you’re running atwo-tailed test, it’s the area to the leftandto the right). ...
What is the cutoff z value (critical value) for a left-tailed test with a significance level of 8%? a. -2.1 b. -1.7 c. -1.4 d. -1.2 Z-tables In problems involving z-values, the area to the left of these z-values is ...
In the "line represents" area, select "other statistic" and add the variable "Maleoff" into the box that lights up. Then select "ok": i. What is the general trend over time? The y axis can be multiplied by 100 to get the percentage of offenders who are male. ii. Do these ...
What is the critical value of t for a 90% confidence interval with df = 14? (Assume a two-tailed test.) a. 1.345030 b. 2.14479 c. 2.62449 d. 1.761310 Critical Value (Confidence Interval): The confidence interval is a ...
Enterprise sales refers to the transaction of a high-value product or service to an organization that often involves customization and tailored onboarding. In enterprise software sales, this is usually a product or software as a service (SaaS) tool that an entire team, department or organization ...