From the Given Data,
n = 7
Using the above formulae, we get
r = 0.30
Option b
Researchers measured the percent body fat and the pre- ferred 4.24 for the amount of salt...
4.24 Researchers measured the percent body fat and the pre ferred amount of salt (percent weight/volume) for several children. Here are data for seven children: SALT Preferred amount 0.2 0.3 0.4 0.5 0.6 0.8 1.1 of salt x Percent body fat y 20 30 22 30 38 23 30 Use your calculator or software: The correlation between percent body fat and preferred amount of salt is about (a) r 0.08. (b) 0.3. ( r 0.8.
The equation of a regression line, unlike the correlation, depends on the units we use to measure the explanatory and response variables. Here is the data on percent body fat and preferred amount of salt. Preferred amount of salt x 0.2 0.3 0.4 0.5 0.6 0.8 1.1 Percent body fat y 19 29 22 30 38 24 29 In calculating the preferred amount of salt, the weight of the salt was in milligrams. (a) Find the equation of the regression...