A researcher speculates that because of differences in diet, Japanese children may have a lower mean blood cholesterol level than U.S. children do. Suppose that the mean level is 170 for the US. What hypothesis should the researcher test?

Suppose we find it to be true, that japanese mean cholesterol is lower than the US. does this prove the original thought, because of diet, Japanese children have lower cholesterol? Explain.

How would you design a study to test the original idea about diet?

Question

A researcher speculates that because of differences in diet, Japanese children may have a lower mean blood cholesterol level than U.S. children do. Suppose that the mean level is 170 for the US. What hypothesis should the researcher test?

Suppose we find it to be true, that japanese mean cholesterol is lower than the US. does this prove the original thought, because of diet, Japanese children have lower cholesterol? Explain.

How would you design a study to test the original idea about diet?