A dietician wishes to see if a person’s cholesterol level will decrease if the diet is supplemented by a certain mineral. Six randomly selected subjects were pretested, and then they took the mineral...

A dietician wishes to see if a person’s cholesterol level will decrease if the diet is supplemented by a certain mineral. Six randomly selected subjects were pretested, and then they took the mineral in supplement for a 6-week period. The results are shown in the table (cholesterol is measured in milligrams per deciliter).  Assume preliminary analysis indicate the differences come from a normally distributed population.

Use the paired t-test to answer the following: at the 10% significance level, do the data provide sufficient evidence to conclude that the mean cholesterol level was greater before the mineral was supplemented than after?

Write the hypotheses for the paired t-test.

H0:___________________________          Ha:__________________________________

compute the test statistic. Round to one decimal place

determine the p-value.