A simple random sample of 121 home prices in Central NJ is conducted and a 95 confidence interval for the mean price is 225 000 325 000 What is the mean selling price for the sample A 275 000 D 278 000 B 260 000 C 280 000 Q2 5 points A simple random sample of 400 home prices in Central NJ is conducted and a confidence interval for the mean price is 346 080 353 920 The mean selling price for the sample is 350 000 with a sample standard deviation of 40 000 What is the level of confidence for the confidence interval A 80 B 90 C 95 D 98