Determine whether the ztest or the Itest should be performed, or whether a statistician should be consulted. A simple random sample of size 23 has mean E = 9.4. The population standard deviation is o=3_?2. The population is not approximately normal. Can you oonclude that the population mean differs from 11? The population standard deviation known. The sample size n (Choose one) 1' greater than 30. The population approximately normal. The correct decision is to {Choose one} 1' - A simple random sample of size 33 has mean ; = 413 and the standard deviation is.'; = 13. Can you conclude that the population mean is less than 40? The population standard deviation known. The sample size at: greater than 30. The correct decision is to {Choose one] 1' . A simple random sample of size 33 ha mean E = 143 and standard deviation .1- = ]_9. The population is approximately normally distributed. Can you conclude that the population mean differs from 10? The population standard deviation known. The sample size in: greater than 30. The correct decision is to lKthewmVJ