A federal report indicated that 11% of children under age 6 live in poverty in New Hampshire, an increase over previous years. How large a sample is needed to estimate the true proportion of children under age 6 living in poverty in New Hampshire within 3% with 90% confidence? Round the intermediate calculations to three decimal places and round up your final answer to the next whole numb

In 1995, it was determined that 78% of US citizens supported a ban on household aerosols.  Thinking that this proportion may have changed over the past few decades, a sample will be taken to test if a change has occurred. In a SRS of 400 citizens taken this year, 332 supported the ban.  Determine the value of the appropriate test statistic to perform this test. Round to 3 decimal places.

A study in 2014 indicated that 19% of American households have a landline telephone that they do not intend to disconnect. In a random sample of 581 American households, how many would we expect to have a landline telephone they do not plan to get rid of? Round your answer to one decimal place.

The number of employees working for Fly Me to the Moon Airlines in 2005 was 16,633, with an expected decrease of 4.4%4.4% per year. At the rate of decrease given, what is the expected number of employees working at Fly Me to the Moon Airlines in 2006? Round your answer to the nearest integer.

Out of 240 racers who started the marathon, 213 completed the race, 18 gave up, and 9 were disqualified. What percentage did not complete the marathon? %Give your answer accurate to at least 1 decimal place.

A hospital director is told that 57%57% of the treated patients are insured. The director wants to test the claim that the percentage of insured patients is under the expected percentage. A sample of 250250 patients found that 125125 were insured. Find the value of the test statistic. Round your answer to two decimal places.

A recent study indicated that 24% of the 137 women over age 55 in the study were widows. Round up your answers to the next whole number for the following questions. How large a sample must you take to be 99% confident that the estimate is within 0.05 of the true proportion of women over age 55 who are widows? If no estimate of the sample proportion is available, how large should the sample be?

A recent study indicated that 24% of the 150 women over age 55 in the study were widows. Round up your answers to the next whole number for the following questions. How large a sample must you take to be 90% confident that the estimate is within 0.02 of the true proportion of women over age 55 who are widows?

your car is more crowded than you think.  table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. The survey stated that the average car occupancy was 1.4 people. check that calculation.