kenldykido7074 kenldykido7074

21-11-2022
Mathematics

Answered

a researcher is interested in estimating how much college students spend on airfare in a year. a random sample of 20 college students yielded a mean of $555 with a standard deviation of $210. assume the airfare is distributed nearly normal. estimate the true population mean of the amount of money college students spend on airfare in a year with a 90% confidence interval.

Answer :

Other Questions

8.49 a normal population with unknown variance has a mean of 20. is one likely to obtain a random sample of size 9 from this population with a mean of 24 and a

the average natural gas bill for a random sample of 21 homes in 19810 zip code during the month of march was $311.90 with a sample standard deviation of $51.60.

The population of a city decreases by 1. 7% per year. If this year's population is 242,000, what will next year's population be, to the nearest individual?

the point estimate of the difference in means is 7 and the margin of error is 5.88. what is the 95% confidence interval for the difference between the means of

f a random sample of 4 tires are selected, what is the probability that the mean number of miles they last is more than 60,000 miles? use this standard normal t

the confidence interval is a. the level of error related to the probability of rejecting the null hypothesis. b. a counting of the number of cases that fall int

in a study on study habits of college students, a group of seniors are asked to complete a survey. after a two-hour seminar on studying skills they are asked to

i take a srs of 300 dog owners and ask if they can identify a welsh corgi from a list of dog pictures. of the 300 surveyed 75 correctly identify the corgi. esti

a researcher collects data from school bus drivers using survey research. the researcher conducts polls of fifty bus drivers in the school district about managi