Aresearcher wishes to estimate the average amount spent per person by visitors to a theme park. he takes a random sample of forty visitors and obtains an average of $28 per person.

a. what is the population of interest?
b. what is the parameter of interest?
c. based on this sample, do we know the average amount spent per person byvisitors to the park? explain fully

a. Number of visitors

b. average() amount spent per person by visitors to the park

c. Yes , we know  the average amount spent per person byvisitors to the park. It is $28 per person.

Step-by-step explanation:

For the given situation, A researcher wishes to estimate the average amount spent per person by visitors to a theme park.

Population by researcher's point of interest : "Number of visitors"

Parameter of interest : "average() amount spent per person by visitors to the park"

Since he takes a random sample of forty visitors and obtains an average of $28 per person.

Here , sample : forty visitors

And average amount spent per person by visitors to the park from sample :  

$28 per person.

The sample means is the best point-estimate for the population mean.

So , the best point-estimate for average amount spent per person by visitors to the park here is $28 per person.

you never say the total so we cant find the percentage used for petrol

step-by-step explanation: