4. A recent study indicated that 29% of the 100 women over age 55 in the study were widows How large a sample must you take to be 90% confident that the estimate is within 5% of the true
proportion of women over age 55 who are widows?

Students will know how much aid they will be getting once they receive an from the college

Did the universe cool off or get hotter as it expanded after the 'big bang"?

The smokey mountains have over 2,100 miles of rushing mountain streams and rivers that flow through the park. in each mile lives a diverse community of native fish, amphibians, insects, and larvae, some of which are found only in the southern appalachians. park managers and scientific researchers test many factors such as fish populations, the watersheds and water tests to determine a) too many lizards are present b) the water quality of the stream c) rainwater is running into local streams d) if visitors to the park are overstaying their welcome