If a test was generally very easy, except for a few students who had very low scores, then the distribution of scores would be

The Flynn effect refers to the a. superiority of certain racial and ethnic groups on intelligence test. b. extreme scores (very height and very low scores) that are more common for males than for females on math tests. c. Stereotype threat that might cause some black students to underperform on standardized test. d. predictive ability of intelligence tests. e. gradual increase in average intelligence score of the general population over the last several decade.

Which of these z-scores might represent a very difficult item in the normal distribution?a.+2.33b.−.52c.−2.06d.+.20

The resistivity of alloys is:(a) very low (b) generally lower than its constituent metals(c) more than resistivity of insulators (d) very high

n the normal distribution, approximately what percentage of test scores will fall between 2 and 3 standard deviations above the mean?a.2.1%b.34.1%c.13.6%d.68%

Which statement is true about ionic compounds?A. Solid ionic compounds are good conductors of electricity.B. Ionic compounds have varying solubilities in water.C. Ionic compounds have very low melting points.D. Ionic compounds are very easy to bend.