Question 1
3/ 3pts
The variations of thetdistribution are especially noticeable when:
Correct!
sample sizes are small
Question 2
3/ 3pts
As N increases, the standard error of the mean:
Correct!
decreases
Question 3
3/ 3pts
The t distribution and the z distribution are all of the following all of the time
except:
Correct!
platykurtic
Question 4
3/ 3pts
A two-tailed outlier for the Z distribution must have a Z score equivalent to
the:
Correct!
highest 2.5% or lowest 2.5% of the z distribution
Question 5
3/ 3pts
In a study of a new drug intended to reduce anxiety, a researcher has a low
dose group, a medium dose group, and a placebo control group. How many
theoretical populations are represented in this study?
Correct!
three
Question 6
3/ 3pts
What information do you need to findtcriticalfor a 95% CI?
Correct!
df
Question 7
3/ 3pts
For every statistic (e.g., mean) a researcher calculates in her sample, she is
estimating that same value in the:
Correct!
population
Question 8
3/ 3pts
We estimate error because:
Correct!
it helps understand the relationship between our sample and the population
Question 9
3/ 3pts
Sampling error refers to:
Correct!
