TB MC Qu. 8-45 (Algo) A website advertises job openings on... A website advertises job openings on its website, but job seekers have to pay to access the list of job openings. The website recently completed a survey to estimate the number of days it takes to find a new job using its service. It took the last 31 customers an average of 80 days to find a job. Assume the population standard deviation is 10 days. Calculate a 95% confidence interval of the population mean number of days it takes to find a job. Multiple Choice O [60.4588, 99.5412] O (77.0554, 82.9446] O [75.9673, 84.0327] O [76.4798, 83.5202]A machine that is programmed to package 1.90 pounds of cereal is being tested for its accuracy in a sample of 47 cereal boxes, the sample mean filling weight is calculated as 1.92 pounds. The population standard deviation is known to be 0.06 pounds. Find the 95% confidence interval for the mean. Multiple Choice O [1.89, 1.96] O [1.90, 1.94) O [1.84, 2.00] O [1.86, 1.98]We draw a random sample of size 25 from the normal population with variance 2.2. If the sample mean is 18.5, what is a 90% confidence interval for the population mean? Multiple Choice O [18.0894, 18.9106] O [17.5701, 19.4299] O [17.6936, 19.3064] [18.0121, 18.9879]