Question Completion Status:

QUESTION 1

1. Identify the potential problem(s) involved with generating or collecting valid data.

   	A.	Cost
   	B.	Bias
   	C.	Error
   	D.	Access to data
   	E.	All of the above
   	F.	None of the above

2.22232 points

QUESTION 2

1. What statistical issue(s) does hypothesis testing attempt to manage?

   	A.	Confirmation bias
   	B.	Unconscious bias
   	C.	Random sampling error
   	D.	Coverage error
   	E.	All of the above
   	F.	None of the above

2.22222 points

QUESTION 3

1. Data analysts prefer to deal with random sampling error rather than statistical bias because

   	A.	All data analysts are fair people
   	B.	There is no statistical method for managing statistical bias
   	C.	They do not want to be accused of being biased in today's society
   	D.	Random sampling error makes their work more satisfying
   	E.	All of the above
   	F.	None of the above

2.22222 points

QUESTION 4

1. It is important to first identify and define the problem accurately because

   	A.	That is the process we are taught to follow
   	B.	The way you define a problem will determine, to a great degree, how you attempt to solve it
   	C.	Doing so will make the process take longer so you will earn more money
   	D.	No one wants you to do this so they must be hiding something
   	E.	All of the above
   	F.	None of the above

2.22222 points

QUESTION 5

1. Why are deviations from the mean squared before being summed?

   	A.	Otherwise, the deviations would always sum to zero
   	B.	Otherwise, the deviations would sometimes be too small
   	C.	Why not?
   	D.	To make the equations too difficult for lay people to understand
   	E.	All of the above
   	F.	None of the above

2.22222 points

QUESTION 6

1. The appropriate probability distribution for calculating probabilities when there is no reason to assume that any outcome is more likely than any other outcome is the

   	A.	Normal distribution
   	B.	Uniform distribution
   	C.	Equal distribution
   	D.	Income distribution
   	E.	All of the above
   	F.	None of the above

2.22222 points

QUESTION 7

1. The appropriate statistical tool for predicting the value of a random variable based on the values of other random variables is

   	A.	Regression
   	B.	Descriptive statistics
   	C.	Visual data displays
   	D.	Analysis of variance
   	E.	All of the above
   	F.	None of the above

2.22222 points

QUESTION 8

1. The appropriate statistical tool for comparing more than two means to determine whether there might be a statistically significant difference between two or more of them is

   	A.	Two-Sample hypothesis test of independent means
   	B.	One-Sample hypothesis test of means
   	C.	Multiple-Sample hypothesis test of independent means
   	D.	Multiple-Sample hypothesis test of paired means
   	E.	All of the above
   	F.	None of the above

2.22222 points

QUESTION 9

1. The more appropriate measure of center to use for a data set that is severely skewed is

   	A.	Average
   	B.	Mean
   	C.	Median
   	D.	IQR
   	E.	All of the above
   	F.	None of the above

2.22222 points

QUESTION 10

1. An appropriate statistical tool for accounting for sampling error in an estimate is

   	A.	A scatter chart
   	B.	A frequency distribution
   	C.	A confidence interval
   	D.	A standardized score
   	E.	All of the above
   	F.	None of the above

2.22222 points