m 1. Let's say you took a sample of 445 voiceactivated smart TVS. The mean rate at which these TVs need to be serviced or replaced IS every 3.5 years, with a standard deviation of 018 years. Given a condence level of 95%. what is the maximum error of estimate? m 2. Out of 6.000 people, 4.500 said they spend over 20 hours pet week on their phones. Construct a 75% confidence inteival for the population mean of people that spend over 20 hours pei week on their phones_ 0 CI=(73,23%,75.01%) O Cl=(74.01%,75.92%) O Cl:[74_3696,75.64%) 0 CI = (73.93%, 75.54%) m 3. The height of pyramids in Egypt is normally distributed. A sample of 1 25 pyramids had a mean height of 460.? ft and a standard deviation of 4.1 feet. With 80% confidence, what is the maximum error of estimate for the actual population mean for the height of Egyptian pyramids? 4. The weight of cell phones is normally distributed. The mean weight of a sample of 300 cell phones is 112 grams, with a standard deviation of 2 grams. With a 95% confidence level, determine the maximum error of estimate. O 18.99% 1.31% 29.73% 22.63%5. Out of sample of 500 people, 25% exercise daily. What is the confidence interval for the population mean of people that exercise daily, given a confidence level of 95%? CI = (21.81%, 28.19%) CI = (20.01%, 29.99%) CI = (21.20%, 28.80%) O CI = (20.98%, 30.02%)