Assume that mid-upper arm circumferences in a population of rural Indian children aged 12 to 60 months follows a normal distribution with an unknown mean. Ten samples, each of four children are drawn from this population by a formal process of random sampling with replacement. The results are in table below.

What is the sample standard deviation for random sample 10?

Mid-upper arm circumference (mm) in a rural Indian population aged 12 to 60 months (10 random samples of size 4)

1). The sample standard deviation is approximately 8.

2). The sample standard deviation is approximately 6.5.

3). The sample standard deviation is approximately 66.

4). The sample standard deviation is 9.2.