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(Solved): WPC300 Quiz 3: Descriptive : Scored 10 out of 10...


WPC300
Quiz 3: Descriptive 
Scored 10 out of 10


Question 1                                   1 pts
The difference between the first and third quartiles is referred to as the ____________.

  •  midrange
  •  interquartile range
  •  variance
  •  standard deviation

  
Question 2                                  1 pts
When two variables are highly positively correlated, the correlation coefficient will be _______.

  • close to 0
  • close to 10
  • close to 1
  • close to -1

 
Question 3                                  1 pts
According to statistical notation, what does  ∑ stand for?

  • to represent sample statistics 
  • to act as a summation operator 
  • to represent the number of items in a population 
  • to represent population measure

 
Question 4                                  1 pts
What are the three principles of describing data?

  • Centrality, dispersion and size
  • Dispersion, range and standard deviation
  • Mean, median and mode
  • Center, spread and shape


Question 5                                  1 pts
For a normal distribution mean is _______ to median.

  • greater than
  • equal
  • less than
  • not equal


Question 6                                  1 pts
Which of the following is an example of a sample?

  • The population of Canada
  • The number of individuals who have a Ford car
  • The number of members in the Democratic party
  • The number of IT employees out of all employees working in an office of Google


Question 7                                  1 pts
Which of the following describes the standard deviation?

  • It is the average of the greatest and least values in the data set.
  •  It is the square root of the variance.
  • It is the difference between the first and third quartiles of a data set.
  • It is the square of variance


Question 8                                  1 pts
Standard deviation of a normal data distribution is a _______.

  • measure of data centrality
  • measure of data dispersion
  • measure of data shape
  • measure of data quality


Question 9                                  1 pts
Which of the following is an example of a measure of dispersion?

  • mean
  • mode
  • variance
  • median


Question 10                                  1 pts
The ________ is the observation that occurs most frequently. 

  • mean
  • mode
  • outlier
  • median


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