A population is distributed with a known standard deviation, =15 units. A random sample of size 30 is obtained from this population. The mean of this sample is 80 . 1. True or False: Since the sample size is areater than 25 the distribution of samole means from this dooulation should be approximately normally distributed 2. What is the lower limit of the 95 ts confidence interval for the population mean ? (2 dp) 3. What is the upper limit of the 95% confidence interval for the population mean ? (2 dp) 4. Based on your confidence interval, would you believe that the true maan in thie ninialation could be 85 ? A population is distributed with a known standard deviation, =15 units. A random sample of size 30 is obtained from this population. The mean of this sample is 80 . 1. True or False: Since the sample sireisarenter than.25 the distribution f-samolemeans frmmathisinonilationishould be approximately normally distribute True; the Central Limit Theorem applies 2. What is the lower limit of the 95% False; we are not told that the population is normally distributed 3. What is the upper limit of the 95% confidence interval for the population mean 7(2dp) A population is distributed with a known standard deviation, =15 units. A random sample of size 30 is obtained from this population. The mean of this sample is 80 . 1. True of Folse: Since the sample sion it araatur than 25 the distribution of samble means from this population should be approximately normally distributed. 2. What is the lower limit of the 95% confidence interval for the population mean ?(2dp) 3. What is the upper limit of the 95% confidence interval for the popuiation mean if? ( 2 dp) Htion coula be B5? A population is distributed with a known standard deviation, =15 units. A random sample of size 30 is obtained from this population. The mean of this sample is 80 . 1. True or False: Since the sample size is areater than 25 the distribution of samole means from this dooulation should be approximately normally distributed 2. What is the lower limit of the 95 ts confidence interval for the population mean ? (2 dp) 3. What is the upper limit of the 95% confidence interval for the population mean ? (2 dp) 4. Based on your confidence interval, would you believe that the true maan in thie ninialation could be 85 ? A population is distributed with a known standard deviation, =15 units. A random sample of size 30 is obtained from this population. The mean of this sample is 80 . 1. True or False: Since the sample sireisarenter than.25 the distribution f-samolemeans frmmathisinonilationishould be approximately normally distribute True; the Central Limit Theorem applies 2. What is the lower limit of the 95% False; we are not told that the population is normally distributed 3. What is the upper limit of the 95% confidence interval for the population mean 7(2dp) A population is distributed with a known standard deviation, =15 units. A random sample of size 30 is obtained from this population. The mean of this sample is 80 . 1. True of Folse: Since the sample sion it araatur than 25 the distribution of samble means from this population should be approximately normally distributed. 2. What is the lower limit of the 95% confidence interval for the population mean ?(2dp) 3. What is the upper limit of the 95% confidence interval for the popuiation mean if? ( 2 dp) Htion coula be B5