Assume you get a new job as a coach for a sports team, and one of your first decisions is to choose the sports drink that the team will use during practices and games. You obtain a Sports Report magazine so you can use your statistical background to help you make the best decision. The following table lists the most popular sports drinks and some important information about each. Answer the following questions about the table. Drink
Calories
Sodium
Potassium
Cost
Gatorade
60
110
25
$1.29
Powerade
68
77
32
$1.19
All Sport
75
55
55
$0.89
10-K
63
55
35
$0.79
Exceed
69
50
44
$1.59
1st Ade
58
58
25
$1.09
Hydra Fuel
85
23
50
$1.89
a/ Compute the mean cost per container, and create a 95% confidence interval about that mean.
b/ Do all the costs per container fall inside the confidence interval? If not, which ones do not?
c/ How many degrees of freedom are there?
d/ If cost is a major factor influencing your decision, would you consider cost per container of cost per serving?