Question 9 of 23
0.0/ 1.0 Points
A lab technician is tested for her consistency by taking multiple measurements of
cholesterol levels from the same blood sample. The target accuracy is a variance in
measurements of 1.2 or less. If the lab technician takes 16 measurements and the
variance of the measurements in the sample is 2.2, does this provide enough evidence
to reject the claim that the lab technician’s accuracy is within the target accuracy?
= .01 level of significance, what is your conclusion?
Question 10 of 23
1.0/ 1.0 Points
In an article appearing in
a writer states that the average number of calories in a serving
of popcorn is 75. To determine if the average number of calories in a serving of popcorn is different from
75, a nutritionist selected a random sample of 20 servings of popcorn and computed the sample mean
number of calories per serving to be 78 with a sample standard deviation of 7.
= .05 level of significance, does the nutritionist have enough evidence to reject the