Figure 22 shows a walkway with a handrail. Angle a is the angle between the walkway and the horizontal, while angle {3 is the angle between the vertical posts of the handrail and the Walkway. Use Figure 22 to work 15 through 18. (Assume that the vertical posts are perpendicular to the horizontal.)Are angles a and {3 complementary or supplementary angles?

Hypothesis testing Null hypothesis use “=” signs Assume null hypothesis is true until you find evidence to reject Status quo, no change Mean of normal distribution P value Equivalent to probability, small evidence against the null If p value is low the null shall go, which mean if the p value is lower than the null you have enough evidence to reject it. Alternative hypothesis Tells us what probability we are calculating under the curve Uses signs = Experimental hypothesis Level of significance A p value that is used to determine if we will accept or reject the null hypothesis. If you reject null hypothesis then you are saying that the alternative hypothesis is true. Practical Significance: deciding if the result is actually important