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Data on the speed (in mph) for random sample of 30 cars travelling on a highway was collected. The mean speed was 63.3 m
Posted: Mon Nov 15, 2021 10:43 am
by answerhappygod
- Data On The Speed In Mph For Random Sample Of 30 Cars Travelling On A Highway Was Collected The Mean Speed Was 63 3 M 1 (40.99 KiB) Viewed 95 times
Data on the speed (in mph) for random sample of 30 cars travelling on a highway was collected. The mean speed was 63.3 mph with a standard deviation of 5.23 mph. Find the 95% confidence interval for the mean speed of all cars travelling on the highway. Assume the conditions hold. 1. Sample size is cars. 2. The mean speed of 63.3 mph refers to (population mean / sample mean) 3. Interpret the interval: We are 95% confident that the mean speed of all cars is between mph and mph. Round to 1 decimal. 4. Is it plausible that the mean speed of all cars on the highway is 67 mph? (yes/ no)