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WPC 300 Quiz Questions with verified solutions
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WPC 300 Quiz Questions with verified solutions
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WPC 300 Quiz Questions with verifiedsolutions
Which of the following violates the principle of data visualization? - correct answer ✔✔The data-ink ratio
should be higher than 1
When the lie-factor of a graphical chart is more than 1, - correct answer ✔✔the size of the effect shown
in the graph is bigger than the actual effect in the data.
In for a chart to minimize graphical complexity, the data-ink ratio must be: - correct answer ✔✔close to 1
Which are useful principles for data visualization? - correct answer ✔✔The graph suggests a possible
true effect
Visualization of spatial data are most illustrative when shown using - correct answer ✔✔Maps
Which of the following statements is a reason not to use a table for data visualization? - correct answer
✔✔Tables cannot easily show trends
Deleting the grid lines in a chart - correct answer ✔✔Increases the data-ink ratio
Which of the following statement(s) about charts is true? - correct answer ✔✔Data ink can sometimes
help tell a richer story
In order for a chart to have graphical integrity, the lie factor must be: - correct answer ✔✔close to 1
3 Truths of Charts - correct answer ✔✔1. Should have graphical integrity
2. Should tell a story
3. Should minimize graphical complexity
, Which of the following is a Type-I error? - correct answer ✔✔The null hypothesis is actually true, but the
hypothesis test incorrectly rejects it.
What is the confidence interval when the level of significance is 0.07? - correct answer ✔✔0.930
Which of the following is a difference between the t-distribution and the standard normal (z)
distribution? - correct answer ✔✔The t-distribution has a larger variance than the standard normal
distribution
Which of the following is a continuous random variable? - correct answer ✔✔The time to complete a
specific task
The central limit theorem states that if the population is normally distributed, then the - correct answer
✔✔Sampling distribution of the mean will also be normal for any sample size
The WPC Sports Company has noted that the size of individual "customer order" is normally distributed
with a mean of $100 and standard deviation of $12. If a soccer team of 16 players were to make the next
batch of orders, what would be the standard error of the mean? - correct answer ✔✔3.00 (12 (st dev)
divided by 4 (sqrt of sample size)
Which of the following proposition describes an existing theory or belief? - correct answer ✔✔Null
hypothesis
In order to reject the null hypothesis, the p-value must be less than the - correct answer ✔✔Alpha
When sample size increases - correct answer ✔✔Confidence interval decreases
You are collecting data via an online survey to improve education standard at ASU. Which of the
following methods will not result in data collection bias? - correct answer ✔✔Anonymously data
collection by hiding ASU brand in the survey question.
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