What critical value of t should be used for a 95% confidence interval for the population mean based on a random sample of 21 observations?
Find the t-table here.
O * = 1.721
O t = 1.725
O t* = 2.080
O t* = 2.086

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15