Suppose a random sample of 84 men has a mean foot length of 26.9 cm with a standard deviation of 2.1 cm. what is an 80% confidence interval for this data?

How does a low unemployment rate affect a nation's economy? a. the nation has a higher number of productive resources. b. the nation can spend more money on for unemployed people. c. the nation can save money by paying lower salaries to a large workforce. reset

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220

What is the measure of ba (the minor arc) in the diagram below?