2. Which of the following is used only in correlation studies?
a. Double blind
b. Placebo
C. Random assignment
d. Scatterplot
e. Random sample

On a certain portion of an experiment, a statistical test result yielded a p-value of 0.18. what can you conclude? 2(0.18) = 0.36 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 18% of the time, so the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 82% of the time, so the test is not statistically significant. 0.18 > 0.05; the test is statistically significant. p = 1 - 0.18 = 0.82 > 0.05; the test is statistically significant.

An important skill for the beginning home inspector is a. familiarity with reading electric meters. b. good telephone interviewing technique. c. experience in issuing building permits. d. ability to interpret building codes.

How do astronomers measure the amount of dark matter in the universe