A study is done on families with children under 18 years old to see whether or not the children usually carry a mobile phone with them. The results are given in the two-way table below. Phone No phone Total Age 7-10 125 391 516 Age 11-14 383 243 626 Age 15-18 360 37 397 Total 868 671 1539 Find a 95% confidence interval for the proportion of children age 15-18 who carry phones.

Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 95% confidence level. What does the confidence interval tell about the population of all college students in the state? 3.6, 3.0, 4.0, 4.6, 2.8, 4.4, 3.5, 4.4, 4.2, 4.1, 4.0, 3.6, 3.5, 4.0, 3.7 O ..... What is the confidence interval for the population mean µ? (Round to two decimal places as needed.)

Listed below are student evaluation ratings of​ courses, where a rating of 5 is for​ "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a ​98% confidence level. What does the confidence interval tell about the population of all college students in the​ state?4.0, 3.0, 4.1, 4.9, 3.1, 4.1, 3.4, 4.8, 4.4, 4.0, 4.2, 3.9, 3.3, 4.1, 4.1

Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)

Listed below are student evaluation ratings of​ courses, where a rating of 5 is for​ "excellent." The ratings were obtained at one university in a state.   Construct a confidence interval using a 98​%confidence level.   What does the confidence interval tell about the population of all college students in the​ state?   3.5​, 2.8​, 3.9​, 4.6​, 2.8​, 4.0​, 3.2​, 4.7​, 4.2​, 4.0​, 4.3​, 3.7 3.4​, 3.9​, 3.7

The length of a 95% confidence interval for mean Age is which of the following? (Because of potential roundoff, choose the closest.)

Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 99% confidence level. What does the confidence interval tell about the population of all college students in the state? 4.0, 3.0, 4.0, 4.5, 3.1, 4.2, 3.4, 4.5, 4.6, 4.4, 4.1, 3.9, 3.5, 4.0, 3.9 What is the confidence interval for the population mean µ? (Round to two decimal places as needed.) What does the confidence interval tell about the population of all college students in the state? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. OA. The results tell nothing about the population of all college students in the state, since the sample is from only one university. B. We are confident that 99% of all students gave evaluation ratings between and (Round to one decimal place as needed.) OC. We are 99% confident that the interval from (Round to…

Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 90% confidence level. What does the confidence interval tell about the population of all college students in the state? 4.0, 3.1, 4.0, 4.8, 3.1, 3.9, 3.6, 4.9, 4.2, 4.1, 4.4, 3.6, 3.2, 4.1, 3.7 O What is the confidence interval for the population mean p? <µ< (Round to two decimal places as needed.)

Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 95% confidence level. What does the confidence interval tell about the population of all college students in the state? 4.0, 3.1, 3.9, 4.8, 3.2, 4.1, 3.8, 4.3, 4.2, 4.0, 4.3, 3.8, 3.6, 4.0, 4.0 D What is the confidence interval for the population mean µ? |<µ< (Round to two decimal places as needed.)