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Discovering Statistics

Statistics

Quiz 6 :

The Beast of Bias

Quiz 6 :

The Beast of Bias

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What does the central limit theorem state?
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A

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Which of the following equations best reflects a linear model?
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A

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Calculate the z-score for the skewness of the resting heart rate data.
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A

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Which individual has had their stature expressed in centimetres as opposed to metres?
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What assumption can be made regarding the distribution of the heart rate data?
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What is the correct expression for the Kolmogorov-Smirnov test for the systolic blood pressure data of the rugby players?
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What assumption can be made regarding the distribution of the age data?
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Calculate the z-score for the kurtosis of the resting heart rate data.
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Calculate the z-score for the skewness of the resting heart rate data.
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Sources of bias can be reduced if which of the following assumptions are met?
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Plot resting diastolic blood pressure as a histogram. You should get the histogram below. How would you describe its appearance? img
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Split the data according to the sport. Run a Kolmogorov-Smirnov test on the diastolic blood pressure data. Which group's data cannot assume a normal distribution?
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Ignoring the sport played, run a Kolmogorov-Smirnov test on the age variable. What is the correct expression for the result?
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The z-score for the kurtosis or skewness of a data set can be considered significant if it falls between which range?
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What does Levene's test do?
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What does the X in Q1 refer to?
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Which of the following descriptions refers to statistical bias?
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Why does a Shapiro-Wilk test sometimes conclude that the data are not normally distributed (i.e. significant) when a Kolmogorov-Smirnov test is non-significant?
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Statistical bias can affect which of the following statistical phenomena?
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Use the compute function to create a new variable called mean arterial pressure (MAP). The equation you will need to enter is as follows: MAP = DBP+(0.333(SBP-DBP). Calculate the z-score for the kurtosis of the MAP data.
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