If you get no responses to your statistics posts, try this:
Go to http://www.khanacademy.org/
Click on Subjects in the upper left of the screen.
Click on Statistics and Probability in the drop-down list, and then choose the area in which you need to learn more.
You want to rent an unfurnished one-bedroom apartment in Dallas next year. The mean monthly rent for a random sample of 11 apartments advertised in the local newspaper is $1050. Assume the monthly rents in Dallas follow a Normal distribution with a standard deviation of $290. Find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community.
(Round your answers to two decimal places.)
($_________ , $_______)
2 answers
.95 = mean ± Z(SD) = 1050 ± 290Z
Look in the back of your statistics textbook for a table called something like “area under normal distribution” to find the proportion/probability (±.025) and its Z score. Insert the Z score into the equation above to find your answers.
Look in the back of your statistics textbook for a table called something like “area under normal distribution” to find the proportion/probability (±.025) and its Z score. Insert the Z score into the equation above to find your answers.
1 answer