a study of the accuracy of fast food drive-through orders, Rest Construct a 90% confidence interval estimate of the percentag Compare the results from part (a) to this 90% confidence inter nclude? Construct a 90% confidence interval. Express the percentages |

Use R Studio to answer the following question:

A poll conducted in 2013 found that 52% of U.S. adult Twitter users get at least some news on Twitter. The standard error for this estimate was 2.4%, and a normal distribution may be used to model the sample proportion. Construct a 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter, and interpret the confidence interval in context. The point estimate p .52 The confidence coefficient z* = syntax incomplete. (Round to two decimal places.) The standard error SE = .024 We are 99% o confident that the true percent of U.S. adult Twitter users who get at least some news on Twitter is between % and %. (Enter the last two answers as percents, with the smaller percent first and rounded to the nearest tenth.)

A random sample of statistics students were asked to estimate the total number of hours they spend watching television in an average week. The responses are recorded in Table. Use this sample data to construct a 98% confidence interval for the mean number of hours statistics students will spend watching television in one week. Assume the population is normally distributed.  (Give your answer to 3 decimal places if necessary.) 20 13 1 10 20 0 10 13 16 10 1 17 18 3 9 (?,?)

An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. Step 1 of 2: Suppose a sample of 390 new car buyers is drawn. Of those sampled, 105 preferred foreign over domestic cars. Using the data, estimate the proportion of new car buyers who prefer foreign cars. Enter your answer as a fraction or a decimal number rounded to three decimal places. Answer(How to Enter) 2 Points 田 Tables E Keypad

In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​ dates, and a sample of the results is listed below ​(1=not ​attractive; 10=extremely ​attractive). Construct a confidence interval using a 90​% confidence level. What do the results tell about the mean attractiveness ratings of the population of all adult​ females?   7​, 7​, 3​, 8​, 4​, 5​, 7​, 7​, 7​, 10​, 5​, 9

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? a. What is the confidence interval for the population mean mu? less than muless than  ​(Round to two decimal places as​ needed.)