Question

in examining the difference among the types of broncos, what is the null hypothesis?
(a) $h_0: mu_1=mu_2=mu_3$
(b) $h_0: mu_1>mu_2>mu_3>mu_4$
(c) $h_0: mu_1(d) $h_0: mu_1=mu_2=mu_3=mu_4$

Explanation:

The null hypothesis in an analysis - of - variance (ANOVA) type situation where we are comparing means of multiple groups (types of Broncos here) assumes that all population means are equal.

Answer:

D. $H_0:\mu_1=\mu_2=\mu_3 = \mu_4$