Sketch the standard Normal curve for the test statistic and mark off areas under the curve to show why a value of z z that is significant at the 1 % 1% level in a one‑sided test is always significant at the 5 % 5% level. If z z is significant at the 5 % 5% level, what can you say about its significance at the 1 % 1% level?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

30 ! the graph shows the number of siblings different students have. select from the drop-down menus to correctly complete the statement.

Statement reason 1. δabc is similar to δced. given 2. 3. definition of slope 4. slope of slope of definition of slope 5. slope of × slope of multiplying the slopes 6. slope of × slope of substitution property of equality 7. slope of × slope of simplifying the right side the table contains the proof of the relationship between the slopes of two perpendicular lines. what is the reason for statement 2? a. parallel line segments that meet a common perpendicular line are proportional in length. b. the lengths of vertical and horizontal sides in congruent triangles are in a common ratio. c. trigonometric identities determine the lengths of the legs in a right triangle. d. corresponding side lengths in similar triangles are proportional in length.