(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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