EDCO 735 / EDCO735 QUIZ 2
2nd attempt
The standard error is related to all of the following except:
causal inference
dependent on sample size
is smaller with a larger sample
involves the confiden
...
EDCO 735 / EDCO735 QUIZ 2
2nd attempt
The standard error is related to all of the following except:
causal inference
dependent on sample size
is smaller with a larger sample
involves the confidence interval
Calculating the sample standard deviation always makes use of:
variance
random sample
convenience sample
nominal level of measurement
Question 3
3 / 3 pts
Outliers are defined by:
where the scores or values fall on a known (t, z, F) distribution
subtracting one from the sample size
the square root of variance
dividing the SS by the mean
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
A two-tailed outlier for the t distribution must have a t score equivalent to the:
highest 2.5% or lowest 2.5% of the t distribution
highest 5% or lowest 5% of the t distribution only the highest 5% of the t distribution
only the lowest 5% of the t distribution
For every statistic (e.g., mean) a researcher calculates in her sample, she is estimating that same value in the:
population
second sample
experimental sample
distribution
df are used because:
Correct Answer
samples underestimate population variance
sample distributions are skewed
samples underestimate SS
samples provide the point estimate Warner - Section 2.5
The variations of the t distribution are especially noticeable when:
sample sizes are small
the sample is biased
the population is normal
the sample is normal
As sample size increases while all other things are constant, the confidence interval:
decreases
increases
remains constant
it can increase or decrease
The t distribution and the z distribution are all of the following all of the time except:
Correct Answer
platykurtic
discovered or developed by statisticians
have values associated with percentiles
symmetrical
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