- 6 4 Pts Wearing Socks The United States Has About 330 Million Residents Suppose That You Want To Estimate The Propor 1 (143 KiB) Viewed 22 times
- 6 4 Pts Wearing Socks The United States Has About 330 Million Residents Suppose That You Want To Estimate The Propor 2 (203.05 KiB) Viewed 22 times
6. (4 pts) Wearing Socks The United States has about 330 million residents. Suppose that you want to estimate the proportion of Americans who wore socks yesterday to within a margin-of-error of 3.5 percentage points with 95% confidence. Which of the following is closest to the number of people that you would need to randomly sample? Show work to support your choice. A. 30 B. 1000 €. 30,000 D. 1,000,000 E=.035 ت = 5، سے اتر 2 35 * 330000000 too 1155oooo 2 n = pq
pts) Infection Rates A medical investigation states that the average number of infections per week ospital in southwestern Pennsylvania is 16.3. A researcher claims that infections at this hospital increased. To test this claim, the researcher selects a random sample of 10 weeks had a mean per of 17.7 infections. The sample standard deviation is 1.8 infections. Is there enough evidence to prt the claim at a=0.01? Assume the variable is normally distributed and use the P-Value Method to he hypothesis. Source: Based on information obtained from Pennsylvania Health Care Cost Containment Council. Hou-16.3 claim Ha: u 7716.35 S8 = 1.8 4.3 n = 10 Yo - 16.3 C c=16.3 4:17.7 Plest (stats, 16.3, 1.8, 10 经 1P