A researcher wishes to compare the proportion of marijuana usage among students using usage categories low, medium, and high. She wants to determine if usage is related to parents' income, using categories low, medium, and high. She will analyze this data using the chi-square test. the two-sample procedures for proportions. the two-sample \( t \) test procedure. ANOVA.

Exercise 1. How many residents had at least two falls in the last 24 months? Put the answer in cell B15. Exercise 2. What percentage of the nursing home residents had at most eight falls in the last 24 months? Put the answer in cell B16.

Express the confidence interval \( 0.111<p<0.777 \) in the form \( \hat{p} \pm E \).

A correlation greater than 1 indicates a perfect relationship (A) True (B) False

Calcúlese el estimador máximo-verosímil del parámetro \( \lambda \) la distribución de Poisson en muestras aleatorias simples de tamaño \( n \).

summarize your understanding of the role statistics play in managerial decision-making.