Question

Table 2.72 gives the percent of children under five considered to be underweight. What is the best estimate for the mean percentage of underweight children?

Short answer

The best estimate for the percentage of children who are underweight is:$\overline{X}==26.57$

Step-by-step solution

To find

What is the best estimate for the mean weight percentage of underweight children.

Explanation

The sample mean is the best estimate of the average in statistics because it is an unbiased estimate of the population mean. In the case of grouped series, the sample mean is calculated using the following formula:

$\overline{x}=\frac{\sum fx}{\sum f}$

The sample mean calculated as:

$\overline{x}=\frac{1328.65}{50}=26.57$

Hence the best estimate for the percentage of children who are underweight is$\overline{X}=26.57$