In a survey of 1741 US adults, 697 said they think genetically modified food is safe. A 95% confidence interval for the proportion, p, of all US adults who think genetically modified food is safe, is closest to O 0.4 ± 0.23 O 0.4 ± 0.039 O 0.4±0.023 O 0.4±0.39

In a random sample of 63, the proportion of the sample with a certain characteristic was 0.61. What is the 95% confidence interval for pp?

In a survey of 1076 adults, a poll asked, "Are you worried or not worried about having enough money for retirement?" Of the 1076 surveyed, 551 stated that they were worried about having enough money for refirement. Construcd a 99% confidence interval for the proportion of adults who are worried about having enough money for retirement. A 99% confidence interval for the proportion of adults who are worried about having enough money for retirement is ( (Use ascending order. Round to four decimal places as needed) Question Help Enter your answer in each of the answer boxes. P Type here to search 4 00 ENG 414/2021 DELL F12 VYZ Priscr Delehes Seers F10 FO F7 F2 FS Esc F1 Fa SAL 40 BackspuMA %23 5S 13 T R Tab 10 Enter K D F S A S Caps Lock Shift Ctri Alt Alt Fr Ctri

For a sample with a mean of 10, a std of 5 and an n of 30, what is the lower bound of the 95% confidence interval?

A study of 420 comma 026   cell phone users found that 140   of them developed cancer of the brain or nervous system. Prior to this study of cell phone​ use, the rate of such cancer was found to be 0.0434 ​% for those not using cell phones. Complete parts​ (a) and​ (b).     a. Use the sample data to construct a 90​% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. b. Do cell phone users appear to have a rate of cancer of the brain or nervous system that is different from the rate of such cancer among those not using cell​ phones? Why or why​ not?

A laboratory tested 82 chicken eggs and found that the mean amount of cholesterol was 228 milligrams with o = 19.0 milligrams. Construct a 95% confidence interval for the true mean cholesterol content, u, of all such eggs. O A. 223.89 mg < u< 232.11 mg O B. 224.55 mg < u< 231.45 mg OC. 224.55 mg<µ< 232.11 mg O D. 223.89 mg <µ< 231.45 mg

The Associated Press (October 9, 2002) reported that in a survey of 4722 American youngsters aged 6 to 19, 15% were seriously overweight (a body mass index of at least 30; this index is a measure of weight relative to height). Calculate and interpret a confidence interval using a 99% confidence level for the proportion of all American youngsters who are seriously overweight.

In a survey of 31 students at a local high school, 15 support changing the school's mascot. Find the 95% confidence interval for the true population proportion of students who support changing school's mascot.Choose the correct confidence interval and critical value used in the calculation. A. (0.254,0.714) (Zc=2.576) B. (0.304,0.664)(Zc=1.96) C. (0.304,0.664)(tc=2.0423) D. 0.334,0.634)(Zc=1.645) E. (0.274,0.694) (Zc=2.326)

IS An insurance company collects data on seat-belt use among drivers in a country. Of 1100 drivers 20-29 years old, 24% said that they buckle up, whereas 341 of 1200 drivers 45-64 years old said that they did. Find a 95% confidence interval for the difference between the proportions of seat-belt users for drivers in the age groups 20-29 years and 45-64 years. Construct a 95% confidence interval. The 95% confidence interval for p, -p, is from to . SC (Round to three decimal places as needed.)

A simple random sample of size n=300individuals who are currently employed is asked if they work at home at least once per week. Of the 300 employed individuals​ surveyed, 27 responded that they did work at home at least once per week. Construct a​ 99% confidence interval for the population proportion of employed individuals who work at home at least once per week.