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AP Stats Chapter 1
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What is the shape of this distribution?
left (negatively) skewed
What are two measures of spread (variability)?
range, interquartile range, standard deviation, variance
When describing center, you should talk about one of two measures. What are they?
mean, median
What is the range for this distribution?
49
The ________ 50% of the data in a box plot is between Q1 and Q3.
middle
How is the mean calculated?
Adding all values and dividing the total by the number of values
In an ordered set of data, where is the median located?
the middle
For data to be presented in a pie graph, the percentages of the data categories must add up to what percentage?
100
If I take the number of females that own sports cars and divide it by the total number of females... Is this a part of a marginal of conditional distribution?
Conditional
With 2-way tables, If I take the total for a category and divide it by the total of the table... Is this a part of a marginal or conditional distribution?
Marginal
What percent of survey participants own sports cars?
35%
What percent of females are SUV owners?
75%
What percent of SUV owners are male?
About 13%
Sally surveyed her classmates about their diets. She collected their names, ages, the number of sodas drank per day, the number of glasses of water drank per day, and their gender, How many categorical variables did she collect?
2
Sally surveyed her classmates about their diets. She collected their names, ages, the number of sodas drank per day, the number of glasses of water drank per day, and their gender, How many quantitative variables did she collect?
3
Sally surveyed her classmates about their diets. She collected their names, ages, the number of sodas drank per day, the number of glasses of water drank per day, and their gender, How many variables did she collect?
5
How do you calculate if there are outliers?
Q1 - 1.5 IQR, Q3 + 1.5 IQR - any values outside of that range are outliers
Excluding the possible outlier, what is the shape of the distribution?
Approximately symmetric
What is the median time for the 100-meter sprint? (There are 19 values)
10.4 seconds
On the AP exam, if you were asked to choose the best fertilizer, which would you choose and why?
Growfast, because it more consistently produces taller plants
Which fertilizer has the most consistent heights?
Growfast
Which fertilizer has the lowest median height?
None (no fertilizer)
How do you find interquartile range?
Q3 - Q1
What is the shape?
Right Skewed
What is the shape?
Left Skewed
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