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2 cards from this section. Quick, good the night before a test.
What is the arithmetic mean of 5, 10, and 15?
Add the numbers and divide by how many there are.
If the average time of 4 measurements of 3.7, 3.9, 3.6, and 3.8 seconds is asked, what is it?
Calculate the total sum then divide by 4.
What does the mean represent in a data set?
Think about how you find the average.
Is a low standard deviation indicative of closely clustered data points?
Recall the meaning of standard deviation.
A researcher records the following weights (in grams) of apples: 150, 152, 148, 149. Calculate the mean and standard deviation.
First calculate the mean, followed by deviations from that mean.
Given a set of measurements with a mean of 20 and standard deviation of 4, what would be the 95% confidence interval if N = 25?
Recall the formula for confidence intervals involves the SEM and a Z-score for the desired confidence level.
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