The mean will be less than the median because the mean is pulled toward the long tail in this left- skewed distribution.
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monster
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gift
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shark
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lifesaver
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15
Explain how this graph is misleading.
Based on the heights of the people, it appears that the peak of social media use is ages 50-64, but really it is ages 19-29.
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20
How fuel efficient? Here are the EPA estimates of city gas mileage in miles per gallon (mpg) for the sample of 21 model year 2014 midsize cars.19 Make a dotplot of these data.
dot plot.
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15
Describe the shape of the distribution.
slightly left-skewed with a single peak on the 105 - 109 stem and a gap from 84 to 93.
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banana
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seesaw
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fairy
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thief
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20
Asherâs height is at the 88th percentile of the distribution. Interpret this value in context. How tall is Asher?
Asherâs height is larger than 88 percent of the 25 students in Mrs. Navardâs statistics class. (0.88)(25) = 22, so Asher is taller than 22 of the 25 students. A
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10
What is the relative frequency of January?
17.5%
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15
Which measure of center better describes a typical birthrate? Explain.
The median better summarizes the center of the distribution because the birth rate distribution is skewed to the left.
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eraser
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star
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fairy
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baam
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10
What percent of vehicles would fall in the âOtherâ category?
2%
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15
Stand tall The heights of the 25 students in Mrs. Navardâs statistics class have a mean of 67 in. and a standard deviation of 4.29 in. Find the standardized score (z-score) for Boris, a member of the class who is 76 in. tall.
2.1
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15
What is the percentile for a lamp that lasted 900 hours?