If the average BMI of adults in country A is 20 with a standard
deviation of 3, what is the probability that the mean of random
sample of 36 adults selected from country A is less than 21?
(Assume that the BMI is normally distributed.)
A.
0.341
B.
0.477
C.
0.977
D.
0.159
E.
0.382
A research wishes to know whether the average weight gain from a
certain diet program is greater than 4 lb in
a month for a particular population of men weight between
130 lbs to 140 lbs. A random sample of 5 subjects
selected from this population and went through this diet program
and the weight gain (in pounds) data is the followings: 2.2
4.5 1.9 3.1 2.4.
Which of the followings is
the correct conclusion when using the t-test to
test if the average weight gain is greater than 4 lb
using the data values above?
A.
None of the above
B.
Right-tailed test
C.
Two-tailed test
D.
Left-tailed test
A research wishes to know whether the average weight gain from a
certain diet program is greater than 4 lb in
a month for a particular population of men weight between
130 lbs to 140 lbs. A random sample of 5 subjects
selected from this population and went through this diet program
and the weight gain (in pounds) data is the followings: 2.2
4.5 1.9 3.1 2.4.
What is the p-value when using the t-test to test if the average
weight gain is greater than 4 lb using the
data values above? (Round the answer to the 3rd decimal place. For
instance, if the value is 0.00237, then write 0.002.)