Question

A manufacturer of batteries routinely tests its products to determine lifetime (hours of continuous usage). Suppose they select a sample of 30 AAA batteries and find that the average lifetime is 1500 hours. What is this called? A. A statistic B. The sampling frame C. the population D. a sample E. a parameter

Answer 1

correct option is A. statistic

Explanation:

given data

sample = 30

batteries = AAA

average lifetime = 1500 hours

to find out

find average lifetime with sample battery what is this called

solution

we know that sample mean that is

average of sample is called sample mean and is statistic

so here 30 sample is used

and here statistic is use to calculate the population parameter

so we can say that correct option is A. statistic