_____ refers to the total number of individuals with a disorder at a specified moment in time.
a. incidence rate
b. observational epidemiology
c. point prevalence
d. lifetime prevalence
Ans: c. point prevalence
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What can we conclude if we reject the null hypothesis in an independent-samples t-test?
a. It is likely that sampling error accounted for the differences between the sample means. b. It is likely that the sample means came from the same population. c. The difference between our sample means is unlikely to be representing zero difference in the population means. d. The difference between our sample means is merely a poor representation of zero difference in the population means.
Which of the following has NOT been shown to be characteristic of early maturation in girls?
a. being more popular and having a better self-image during elementary school b. having greater peer prestige and adult approval in junior high c. being more likely to get into trouble in junior high and high school d. experiencing premature identity formation and having a distorted, poorly formed sense of self
Neither disengagement theory nor activity theory provides a complete picture of successful aging
Indicate whether the statement is true or false.
The critical region of a frequency distribution graph constitutes 5% of the sample mean. If a researcher’s sample mean falls within that 5%, we can infer that all of the following are true EXCEPT this:
a. The researcher found statistical significance b. There is less than a 5% chance that the researcher made a Type II error c. The researcher’s sample mean was truly different from the mean of that population d. The researcher should reject the null hypothesis