a media research company conducted an online ...
a media research company conducted an online survey of adults in a certain country to determine their favorite sport. a friend believes professional football (with revenue of about $13 billion per year) is the favorite sport of 42% of adults in the country. specify the null and alternative hypotheses for testing this belief. be sure to identify the parameter of interest. complete null and alternative hypotheses below. $h_0$: $h_a$: (type integers or decimals. do not round)
Answer
# Explanation:
## Step1: Identify the parameter
The parameter of interest is the proportion $p$ of adults in the country whose favorite sport is professional football.
## Step2: Formulate the null hypothesis
The null hypothesis $H_0$ is a statement of no - effect or no difference. Here, it is the statement that the proportion of adults whose favorite sport is professional football is equal to the claimed value. So, $H_0:p = 0.42$.
## Step3: Formulate the alternative hypothesis
The alternative hypothesis $H_a$ is what we are trying to find evidence for. Since no direction (greater than or less than) is indicated, we use a two - tailed test. So, $H_a:p\neq0.42$.
# Answer:
$H_0:p = 0.42$
$H_a:p\neq0.42$