Your research hypothesis is "In the population, the average number of days unauthorized immigrants stay in the United States is less than 450." What type of hypothesis test should be used?
A) one-sample t test
B) paired-samples t test
C) independent-samples t test
D) one-way ANOVA
E) two-way ANOVA

Question

Quizplus · Accepted Answer

A one-sample t test is the appropriate choice for testing a hypothesis about a population mean when the sample size is small (n < 30) and the population standard deviation is unknown. This test is used to infer conclusions about a population from a sample and determine whether the sample provides strong evidence against a hypothesis about the population. The null hypothesis is that the average number of days unauthorized immigrants stay in the United States is equal to or greater than 450, and the alternative hypothesis is that the average is less than 450.

Your Research Hypothesis Is "In the Population, the Average Number