13. Which of the following data sets can I graph on a histogram? The number of people who drive fords, Cheys. and Toyotas. Income based on ethnic background. How much smarter rats are than dogs.

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

Use the sample data and confidence level given below to complete parts (a) through (d). A drug is used to help prevent blood clots in certain patients. In clinical trials, among 4140 patients treated with the drug, 137 developed the adverse reaction of nausea. Construct a \( 90 \% \) confidence interval for the proportion of adverse reactions. a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.)

Find the critical value \( z_{\alpha / 2} \) that corresponds to the given confidence level. \( 94 \% \)

The bivariate hypothesis-testing procedure that is used when both the independent and dependent variables are continuous is (A) Continuous hypothesis test (B) Pearson's correlation (C) Analysis of variance (D) continuous samples t-test

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