A company has developed a new battery, but the average lifetime is unknown. In order to estimate this average, a sample of 110 batteries is tested and the average lifetime of this sample is found to be 200 hours. The 200 hours is the value of a:
Answers
Answer:
A company has developed a new battery, but the average lifetime is unknown. In order to estimate this average, a sample of 100 batteries is tested and the average lifetime of this sample is found to be 250 hours.
Here the population of interest is:
average
all newly developed batteries by the company
100 batteries, which were tested
lifetime of newly developed batteries
Here the sample is:
average of 250 hours
lifetime of newly developed batteries
not in the list
100 batteries, which were tested
Here the variable of interest is:
lifetime of newly developed batteries
not in the list
average
100 batteries, which were tested
What is the parameter of interest in this case?
average lifetime of 100 batteries tested
average of all newly developed batteries by the company
100 batteries sampled and tested
no parameter is involved in this problem
The 250 hours is the value of a:
sample
statistic
parameter
variable