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AP ReviewInterpreting Things
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A certain species of butterfly has wing length which is approx.
normally distributed with average length of 28.0 mm and a standard
deviation of 2.2 mm.
Interpret the standard deviation in context.
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A researcher raises these butterflies and has a random sample of 10. Find the mean and standard deviation of
the sample mean wing length of these butterflies.
Interpret the mean of this distribution in context.
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A researcher raises these butterflies and has a random sample of 10. Find the mean and standard deviation of
the sample mean wing length of these butterflies.
Interpret the stdev of this distribution in context.
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For graduating seniors at a certain college up the road, the average GPA is 2.72 with a standard deviation of 0.65.
Your cousin is graduating from this devilish college and has a GPA of 3.02.
Calculate and interpret your cousin’s relative position.
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Your sister spent the last four years working hard (some might say,
Bearing Down!) and she is graduating from the college down the street. The
z-score for her GPA is 2.41.
Interpret your sister’s z-score.
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Data was collected on the length of a putt in golf vs. the percentage of time a
putt of that length was successful.
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Write the regression equation.
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Write the regression equation.
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Interpret the slope in context.
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Interpret the slope in context.
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Interpret the correlation coefficient in context.
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Interpret the correlation coefficient in context.
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Interpret R-Sq in context.
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Interpret R-Sq in context.
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Interpret the value of S in context.
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Interpret the value of S in context.
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The P value is the probability of obtaining an effect at least as extreme as the one in your sample data, assuming the null hypothesis is true.
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For example, suppose that a vaccine study produced a P value of 0.04. This P value indicates that if the vaccine had no effect, you’d obtain the observed difference or more in 4% of studies due to random sampling error.
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Ho: There is no association between length of putt and success rate.Ha: There is an association between length of putt and success.
P-value = 0.031
Interpret the P-value in context.
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P-value = 0.031Interpret the P-value in context.
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A 95% confidence interval for the true difference in GPA’s for graduates from the college up the street vs. that of up is (-0.004 0.128).
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A 95% confidence interval for the true difference in GPA’s for graduates from the college up the street vs. that of up is (-0.004 0.128).
Interpret the confidence level.
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A 95% confidence interval for the true difference in GPA’s for graduates from the college up the street vs. that of up is (-0.004 0.128).
Interpret the confidence interval.
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