3. the chamber of commerce wishes to estimate the average expenditures per tourist per visit to the city. a random sample of 81 tourists was selected for investigation. the mean of the sample was found to be $960 with a standard deviation of $210. a. what is the point estimate and the standard error of the mean? explain. b. find the 95% confidence interval estimate.

fer

step-by-step explanation:

aet

answer: 5000

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer