When is the Olmec civilization considered to have been at its height

In 1990, the average income for an american worker was $1,518 per month. in 2000, the average income for an american worker was $2,632 per month. during this time period, a basket of necessities (food, housing, etc.) increased from $657 per month in 1990 to $1,402 per month in 2000. the real value of income ▼ increased decreased over that 10-year period.

Which of the following scenarios illustrates the error in thinking known as overconfidence? choose the correct answer from the following choices, and then select the submit answer button. over the years, about 45 percent of the students in dr. hunt's introductory psychology course have correctly predicted their major, but their confidence in this prediction has been about 75 percent on average. maria was afraid she would fail her introductory psychology midterm. when she got an a, she convinced herself that she had known all along she would do well on the exam. over the years, about 45 percent of the students in dr. hunt's introductory psychology course have correctly predicted their major, and their confidence in this prediction has also been about 45 percent on average. five students in dr. hunt's introductory psychology course were unwilling to predict major because they were afraid of making an incorrect prediction.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.