Question

In a population of subjects who died from lung cancer following exposure to asbestos, it was found that the mean number of years elapsing between exposure and death was 25. The standard deviation was 7 years. Consider the sampling distribution of sample means based on samples of size 35 drawn from this population.

Required:
What will be the standard deviation of the sampling distribution?

Answer 1

You have to use the formula: standard error = standard deviation / √(sample size).

This gives the answer which is approximate 1.18 years.