Given the following abbreviated table of critical values, ...

[washai]

Given the following abbreviated table of critical values,
   one-tailed test two-tailed test
  0.05 1.64 1.96
  0.025 1.96 2.24
  0.01 2.33 2.47
 
  for the hypothesis in question 20, what is the appropriate critical value if one wants a 95 percent confidence level?
 a. 1.64 d. 2.33
  b. 1.96 e. 2.47
  c. 2.24 f. none of the above

Question 2

Explain the components of a box and whisker plot.

[peter]

Answer to Question 1

B
The hypothesis requires a two-tailed test. For a desired confidence level (1) of 95 percent, the critical value is 1.96.

Answer to Question 2

Box and whisker plots provide graphic representations of central tendencies, percentiles, variabilities, and the shapes of frequency distributions. The response categories to a question are shown on the vertical axis. The small box inside the plot represents responses for half of all respondents. This gives a measure of variability called the interquartile range (or midspread). The location of the line within the box indicates the median. The dashed lines that extend from the top and bottom of the box are the whiskers. Each whisker extends either the length of the box or to the most extreme observation in that direction. An outlier is a value that lies outside the normal range of the data. The plots are particularly useful for spotting outliers or comparing group categories (e.g., men vs. women).

[washai]

TYSM

[Joy Chen]

Great answer, keep it coming