In Exercises 69 to 72, show that (gf)(x) = x and (gf )(x) = x. f(x) = 4x + 1, g(x) = 4 - xx

Intro to Applied Stats: Chapter 8 Objectives: ● Describe the mean and median both verbally and algebraically ○ Mean, verbally: average of all scores in a distribution. Mean, algebraically: X bar = ΣX/n. So, X bar = X + X 1X .2/N. 3bar is the mean, N is the number of scores, Σ is the verb directing us to sum the measures, X etc. is th1individual scores. ○ Median, verbally: score in a distribution of scores, above and below which one-half of the frequencies fall. Median, algebraically: MDN locationN+1/ 2. Median for group frequencies: MDN = X + (i)(N/2 - iif )/ f ll i ● Discu