Basics Of Statistics
- Points30
- Questions10
- Time Limit45 Minutes
- Allowed AttemptsUnlimited
Instructions
The quiz:
- Covers the Textbookmaterial from Module 2.
- Contains10 multiple-choice
- Is limitedto 45 minutes.
- Allowsunlimited attempts and the highest attempt will count towards the grade.
- Is worth 30 points.
Attempt History
| Attempt | Time | Score | |
| LATEST | Attempt 1 |
Question 1
3 / 3 pts
Which of the following is needed to calculate confidence interval’s upper limit?
Correct!
SEM
SS
each score value
s2
Question 2
0 / 3 pts
In order to calculate the mean you must:
Correct Answer
have at least interval level of measurement
You Answered
divide by degrees of freedom
take the square root of the sum
multiply each score by itself
Question 3
3 / 3 pts
The standard error of the mean is conceptually similar to:
Correct!
the standard deviation
variance
sum of squared deviations
causal inference
Question 4
3 / 3 pts
The t distribution and the z distribution are:
Correct!
symmetrical
random
leptokurtic
biased
Question 5
3 / 3 pts
A statistic of the sample is an estimate of:
Correct!
the parameter in the theoretical population
the statistic in the second sample
the parameter in the theoretical sample
the parameter in the second sample
Question 6
3 / 3 pts
For every statistic (e.g., mean) a researcher calculates in her sample, she is estimating that same value in the:
Correct!
population
second sample
experimental sample
distribution
Question 7
3 / 3 pts
All of the following calculations are necessary for calculating s except for:
Correct!
t critical
mean
sum of squared deviations
variance
Question 8
3 / 3 pts
We use a t critical when the population is:
Correct!
theoretical
known
skewed
biased
Question 9
3 / 3 pts
z and t distributions are known because:
Correct!
statisticians developed\discovered them
Karl Pearson developed them
they have always been
they measure variance
Question 10
3 / 3 pts
When different sets of data of the same size are randomly chosen from a population, the resulting variation in values is called:
Correct!
sampling error
standard deviation
magnitude of error
confidence interval
