Select the best answer. Vigorous exercise helps people live several years longer (on average). Whether mild activities like slow walking extend life is not clear. Suppose that the added life expectancy from regular slow walking is just 2 months. A statistical test is more likely to find a significant increase in mean life expectancy if (a) it is based on a very large random sample and a 5% significance level is used.(b) it is based on a very large random sample and a 1% significance level is used. (c) it is based on a very small random sample and a 5% significance level is used. (d) it is based on a very small sample and a 1% significance level is used. (e) the size of the sample doesn't have any effect on the significance of the test.

The dictionary definiton of a word reflects the of that word?

Astudy that involves interviews of adults is eligible for expedited review. the researcher wants to add an adolescent population (aged 12 to 17) to the study and has designed a parental permission and assent process. no additional changes are planned. which of the following statements about review of the revised protocol is accurate? the research would only be eligible for expedited review if the adolescents are capable of understanding the same consent forms used for the adult population.the research would only be eligible for expedited review if the adolescents have been declared to be emancipated minors.the new research would need full review by a convened irb because children are a protected population.unless the nature of the questions would raise the level of risk to > minimal for adolescents, the research would still qualify for expedited review.

Why learning about people and places around is important?