Score for this attempt:
30
out of 30
Submitted Sep 1 at 11:25am
This attempt took 25 minutes.
The t distribution and the z distribution are all of the following all of the time
except:
platykurtic
discovered or developed by statisticians
have values associated with percentiles
symmetrical
Which of the following is needed to calculate confidence interval's lower
limit?
S
E
M
SS
each score value
s
2
Question 3
Question 1
3 / 3 pts
Question 2
3 / 3 pts
3 / 3 pts
I
n
wo
r
d
s
,
wha
t
i
s
the
f
o
r
mu
l
a
f
o
r
the
S
E
M
?
the standard deviation divided by the square root of the sample size
the sample mean divided by the square root of the sample size
the standard deviation multiplied by the square root of the sample size
the sample mean multiplied by the square root of the sample size
The
t
distribution and the z distribution are:
symmetrical
random
leptokurtic
biased
The formula for a confidence interval's upper limit is:
Question 4
3 / 3 pts
Question 5
3 / 3 pts
Question 6
3 / 3 pts
M
+
[
t
cr
iti
c
a
l
×
S
E
M
]
M
-
[
t
cr
iti
c
a
l
×
S
E
M
]
s
+
[
t
cr
iti
c
a
l
×
S
E
M
]
s
-
[
t
cr
iti
c
a
l
×
S
E
M
]
Outliers in the sample are defined by:
how many standard deviations there score is from the mean
a measure of dispersion
how far any given score in the population can be expected to be from the
mean
the square root of variance
The mean of a sample is:
an estimate of the mean in the theoretical population
the average of all the scores divided by the degrees of freedom
Question 7
3 / 3 pts
the average of all scores divided by the sample size
the sum of all scores divided by the degrees of freedom
The theoretical population is:
the population that a particular statistic estimates
equivalent to the population of the world
the population where both groups are drawn
only matters when a convenience sample is used
degrees of freedom
is calculated by subtracting one from the sample size
is calculated by dividing the SS by the sample size
is the square root of variance
Question 8
3 / 3 pts
Question 9
3 / 3 pts
is calculated by dividing the SS by the mean
As N increases, the standard error of the mean:
decreases
increases
remains constant
varies randomly
Quiz Score:
30
out of 30
Question 10
3 / 3 pts
