Suppose we take two different random samples from the same population of test scores. The population mean and standard deviation
1 answer:
Answer:
The correct option is (i) I expect the confidence interval based on the sample of 64 data values to be more precise.
Step-by-step explanation:
Consider the provided information.
The sample size is inversely proportional to the standard error of the sample mean decreases.
As the size increase the standard error of the sample mean decreases.
Hence, for greater precision select the confidence interval based on the greater sample of data.
Therefore, we expect the confidence interval based on the sample of 64 data values to be more precise.
The correct option is (i) I expect the confidence interval based on the sample of 64 data values to be more precise.
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Answer:
f(2) = $180.22
f'(2) = $130.00/week
f'(2)/f(2) = 72.13%
Two weeks after the DVD was released, the revenue from sales is $180.22 and is increasing at a rate of $130 per week, or 72.13% per week.
Step-by-step explanation:
The revenue from sales, in dollars, as a function of time, in weeks, is given by:
After two weeks (t=2), the revenue from sales is:
The rate of change, which is given by the derivate of the revenue function, at t = 2 weeks is:
The relative rate of change is:
Therefore, Two weeks after the DVD was released, the revenue from sales is $180.22 and is increasing at a rate of $130 per week, or 72.13% per week.