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(Solved): WPC 300 Assignments Quiz 7 ( Quiz Score: 15 out of 15 )...


 Assignments
Quiz 7
WPC 300


Question 1
1.5 / 1.5 pts
According to statistical notation, what does  ∑ stand for?

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

  
Question 2
1.5 / 1.5 pts
For a normal distribution mean is _______ to median.

  • not equal
  • greater than
  • less than
  • equal

  
Question 3
1.5 / 1.5 pts
Which of the following describes a positively skewed histogram?

  • a histogram that has no fluctuation in mass
  • a histogram that tails off towards the right
  • a histogram for which mean and mode values are the same.
  • a histogram with large kurtosis

  
Question 4
1.5 / 1.5 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 difference between the first and third quartiles of a data set.
  • It is the square root of the variance.
  • It is the square of variance

  
Question 5
1.5 / 1.5 pts
Which of the following is true for a median?

  • For an even number of observations, the median is the mean of the two middle numbers
  • Median can be calculated no matter how the data is arranged
  • A median is only meaningful for interval or ordinal data and not for ratio data
  • Medians are affected by outliers

  
Question 6
1.5 / 1.5 pts
Which of the following is an example of a sample?

  • 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
  • The population of Canada

  
Question 7
1.5 / 1.5 pts
The difference between the first and third quartiles is referred to as the ____________.

  • standard deviation
  • midrange
  • interquartile range
  • variance

 
Question 8
1.5 / 1.5 pts
Standard deviation of a normal data distribution is a _______.

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

  
Question 9
1.5 / 1.5 pts
What are the three principles of describing data?

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

  
Question 10
1.5 / 1.5 pts
The ________ is the observation that occurs most frequently. 

  • outlier
  • mean
  • mode
  • median

 
Quiz Score: 15 out of 15



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