64 college students are randomly selected to determine the mean amount money that they spent on coffee in a week. On average, these students spent $20 per week on coffee. The population of college coffee drinkers is normally distributed with a standard deviation of $5. Using 95% confidence level, determine the confidence interval of the college students who are coffee drinkers. O $18.775 - $21.225 O $17.555 - $21.225 O $18.775 - $22,225 O $15.225 - $23.225 Question 2 5 pts What is the z score or value for 85% confidence level of a population with known standard deviation O 1.44 O 1.24 O 1.64 O 1.34 Question 3 5 pts The weight of baracuda fish is normally distributed with a population standard deviation of 25 lbs. 250 fish are caught from randomly from the ocean. Their average weght is 20 lbs. Using 95% confidence level, what is the confidence interval in pounds.A hospital is trying to cut down on emergency room wait times. It is interested in the amount of time patients must wait before being called back to be examined. An investigation committee randomly surveyed 70 patients. The sample mean was 1.5 hours with a sample standard deviation of 0.5 hours. Which distribution should you use for this problem? O Student's t O Standard Normal z O Student's z O Standard Normal t Question 5 5 pts The data in Table 8.2 are the result of a random survey of 39 national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let X = the number of colors on a national flag. X Freq 1 7 3 18 4 7 5 6 What is the 95% confidence interval for the true mean number of colors on national flags. O 2.93 - 3.59 O 1.93 - 3.59