Answer Happy

In a convenience sample conducted by a marketing agency. 216 of 832 people residing in the U.S. who are age 15-19 years confessed to bringing their cell phone with them on every trip to the bathroom. Check the criteria for calculating a 95% confidence interval. a) Round to 3 decimal places, if needed. Check requirements: b) Is this a random sample or a randomized experiment? O no O yes C) Are the observations independent? Check this by using n < 0.05N. < 0.05N What does this tell us the required population size is? Round to 1 decimal place, if needed. NZ Note, there is about 20 million 15-19 year olds in the U.S. This means that The observations are independent because the sample size is less than 5% of the population size, i.e. n < 0.05N It is impossible to tell whether the observations are independent or not with the given information The observations are NOT independent because the sample size is NOT less than 5% of the population size, i.e. n > 0.05N

d) is the sample size large enough? Check this by using np > 10 and n(1-h) > 10. Round to the nearest whole number. пр (1 - i) = This means that the sampling distribution of p is O Unknown shape because not enough information is given in the problem. O Not Normal because np and n(1-P) are not both greater or equal to 10. O Approximately Normal regardless of sample size. O Approximately Normal because the sample size n > 30. O Approximately Normal because np > 10 and n(1-) > 10. O Approximately Normal because np <10 and n(1-P) < 10. - The criteria to calculate a 95% confidence interval are satisfied? yes O no