The table below gives the percent of children under five considered to be underweight.Percent of Underweight Children Number of Countries16–21.45 2121.45–26.9 526.9–32.35 1132.35–37.8 637.8–43.25 743.25–48.7 1What is the best estimate for the mean percentage of underweight children? (Round your answer to two decimal places.)
Question
The table below gives the percent of children under five considered to be underweight.Percent of Underweight Children Number of Countries16–21.45 2121.45–26.9 526.9–32.35 1132.35–37.8 637.8–43.25 743.25–48.7 1What is the best estimate for the mean percentage of underweight children? (Round your answer to two decimal places.)
Solution
To estimate the mean percentage of underweight children, we need to find the midpoint of each range, multiply it by the number of countries in that range, sum up these products, and then divide by the total number of countries.
-
First, find the midpoint of each range:
- 16–21.45: (16 + 21.45) / 2 = 18.725
- 21.45–26.9: (21.45 + 26.9) / 2 = 24.175
- 26.9–32.35: (26.9 + 32.35) / 2 = 29.625
- 32.35–37.8: (32.35 + 37.8) / 2 = 35.075
- 37.8–43.25: (37.8 + 43.25) / 2 = 40.525
- 43.25–48.7: (43.25 + 48.7) / 2 = 45.975
-
Multiply each midpoint by the number of countries in that range:
- 18.725 * 2 = 37.45
- 24.175 * 5 = 120.875
- 29.625 * 11 = 325.875
- 35.075 * 6 = 210.45
- 40.525 * 7 = 283.675
- 45.975 * 1 = 45.975
-
Sum up these products: 37.45 + 120.875 + 325.875 + 210.45 + 283.675 + 45.975 = 1024.3
-
Divide this sum by the total number of countries: 1024.3 / 32 = 32.009375
So, the best estimate for the mean percentage of underweight children is approximately 32.01% (rounded to two decimal places).
Similar Questions
According to research, in developed nations approximately _____ children have overweight or obesity.Multiple choice question.1 in 101 in 61 in 2
Around the world, approximately ______ percent of adults have overweight or obesity.Multiple choice question.10204060
Multiple Choice QuestionWhat portion of the child population in the US is obese?Multiple choice question.5-10%30-40%15-20%20-30%
What is the highest rate of malnutrition in children under 5 according to the World Health Organization?答案选项组OverweightNone of the aboveWasting (too thin for their height)Stunting (too short for their age)
Babies: According to a recent report, a sample of 240 one-year-old baby boys in the United States had a mean weight of 25.5 pounds. Assume the population standard deviation is =σ5.1 pounds.Part: 0 / 30 of 3 Parts CompletePart 1 of 3(a) Construct an 80% confidence interval for the mean weight of all one-year-old baby boys in the United States. Round the answer to at least one decimal place.An 80% confidence interval for the mean weight in pounds of all one-year-old baby boys in the United States is <<μ.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.