Quiz: Basics Of Statistics
Due Aug 31 at 11:59pm
Points 30
Questions 10
Time Limit 45 Minutes
Allowed Attempts Unlimited
This quiz is no longer available as the course has been concluded.
Attempt History
Attempt Time Score
Score for this attempt: 30 out of 30
Submitted Aug 19 at 11:39am This
attempt took 6 minutes.
Correct answer
Question 1
3 / 3 pts
The larger the sample size:
the less sampling error
the more sampling error
the more outliers influence our distribution
the less random our sample
Correct answer
Question 2
3 / 3 pts
As sample size increases while all other things are constant, the confidence interval:
decreases
increases
remains constant
it can increase or decrease
Correct answer
LATEST Attempt 1 6 minutes 30 out of 30
Question 3
3 / 3 pts
Known distributions (e.g., t, z, and F) allow us:
determine the percentile of our score or statistic
label our means
determine causal inference
give and receive scores
Correct answer
Question 4
3 / 3 pts
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
Correct answer
Question 5
3 / 3 pts
In order to calculate the sum of squared deviations you must:
calculate the mean
divide by degrees of freedom
take the square root of the sum
multiply each score by itself
Correct answer
Question 6
3 / 3 pts
Which of the following is needed to calculate confidence interval's lower limit?
SEM
SS
each score value
s2
Correct answer
Question 7
3 / 3 pts
A statistic of the sample is an estimate of:
the parameter in the theoretical population
the statistic in the second sample
the parameter in the theoretical sample
the parameter in the second sample
Correct answer
Question 8
3 / 3 pts
The formula for a confidence interval's lower limit is:
M + [tcritical × SEM]
M - [tcritical × SEM]
s + [tcritical × SEM]
s - [tcritical × SEM]
Correct answer
Question 9
3 / 3 pts
What is the formula for the df of a CI?
n - 1
M - 1
s - 1
SEM - 1
Correct answer
Question 10
3 / 3 pts
Which of the following is needed to calculate confidence interval's upper limit?
population mean
SS
tcritical
variance
Quiz Score: 30 out of 30
