11.40 to )4.6%. This data is summarized in the table Percent of Population Obese
ID: 2928818 • Letter: 1
Question
11.40 to )4.6%. This data is summarized in the table Percent of Population Obese Number of Countries 11.4-20.45 20.45-29.45 29.45-38.45 38.45-47.45 47.45-56.45 56.45-65.45 65.45-74.45 74.45-83.45 28 15 What is the best estimate of the average obesity percentage for these countries? (Round your answer to two decimal places.) 124.91 What is the standard deviation for the listed obesity rates? (Round your answer to two decimal places.) Enter a number. The United States has an average obesity rate of 33.9%. Is this rate above average or below? (Round decimal places.) your answer to two Select.than the average obesity rate. The obesity rate of the United States is The United States obesity rate is Select.... than one standard deviation from the mean. Therefore, we can assume that the United States, while 34% obese, Select B have an unusually Select B percentage of obese people. How "unusual" is the United States' obesity rate compared to the average rate? Explain.Explanation / Answer
1. best estimate for average obesity percentage.
Average x = 1279.4/ 52 = 24.60 %
2. Variance S2 = [f.M2 - n (x)2] / (n-1) = [41677.93 - 52 * 24.602] / (52 -1) = 200.188
Standard deviation s = sqrt(200.188) = 14.15%
3. The Obesity Rate of the United States is 33.9% and it is above the average obesity rate.
4. The United States Obestity rate is less than one standard deviation from the mean. Therefore, we can assume that the United States, while 34% obese, doesn't have an unusually high percentage of obese people.
Question2
IQR = third quartile - first quartile = 1447.5 - 528.5 = 919 FTES
IQR represnts
The IQR represents the range of the middle 50 percent of the data values.
Percent of Population Base Midpoint(x) Countries(F) xf fx^2 11.45 - 20.45 15.95 28 446.6 7123.27 20.45-29.45 24.95 15 374.25 9337.538 29.45 - 38.45 33.95 3 101.85 3457.808 38.45 -47.45 42.95 0 0 0 47.45-56.45 51.95 3 155.85 8096.408 56.45-65.45 60.95 2 121.9 7429.805 65.45-74.45 69.95 0 0 0 74.45-83.45 78.95 1 78.95 6233.103 Sum 52 1279.4 41677.93Related Questions
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