For the Unites States, the mean monthly TV bill is
$50 per household (CNBC, February 12, 2008). A sample of 49
households in a southern state showed a sample mean of $48.
Use a population standard deviation of $5.60. Based on this
sample data the TV provider claims that their rates are
less the national average. Test the hypothesis at the 5% level
of significance.
A) Null:
Alternative:
B) Test statistic:
C) Critical t-value:
D) Verdict: