What information is provided by calculations of the “t” test statistic?

Statistical Analysis is divided into two categories: central tendency analysis and dispersion tendency analysis. What are the indicators for dispersion tendency analysis.  I have four in mind: mean standard deviation median, and IRQ Is it all possible?

Please answer the question contained in the following picture

What is test statistics and p value

what is the name for this statistical test

Are the observed frequencies variables? What about the expected frequencies? Explain your answers.

Manually find the first quartile as explained in the lectures for the following values: 3, 6, 18, 6, 10, 4,

Define the term given test statistic

a researcher uses an anonymous survey to investigate the television-viewing habits of 100 American adolescents. he plans to make infrence about tv habits and the american based survery the entire group of american adolescents is an example of? sample, population, parameter, and statistic?

Describe a study in which you can use both nonparametric and parametric statistics. A researcher has participants expecting to receive either painful or mild electrical shocks during a study wait in a quarter-full waiting room with other participants. He then measures whether they choose to sit next to other participants or if they sit far away on their own. What is the best test to run for this study and why?