Classify each of the following quantitative variables as either continuous or discrete.  a. Duration of a ride at Disneyland.  [answera] b. Number of visitors to Disneyland in a day.  [answerb]

In the past, Disneyland believed that 34% of visitors buy a churro.  To see if that has changed, Disneyland plans to choose a random sample of 350 visitors. 1. Assuming that the 34% is correct, what is the mean and standard deviation in the number of visitors in groups of 350 that would be expected to buy a churro?  Where rounding is necessary, round to one decimal places. Mean = [mean] visitors          Standard deviation = [sd] visitors 2. Describe the sampling distribution of the sample proportion for samples of size n = 350. The sampling distribution is [norm] with a mean 

A box contains 12 blue hats, 15 red hats and [x] yellow hats.  If one hat is chosen at random, what is the probability that the hat is blue?   Enter your response rounded to three decimal places in the format 0.XXX.  If you do not use the correct format your response will be considered incorrect. 

The table below gives the probability distribution for the number of classes that a student is taking at a particular community college. Data Table Number of Classes (X) P(X) 1 0.07 2 0.11 3 0.25 4 ? 5 0.09 Complete the table by finding P(4), the probability that a student is taking 4 classes.  [answera] Is the random variable, X, continuous or discrete?  [answerb] What is the most likely number of classes a student at this college is taking?  If rounding is necessary, round to two decimal places. [answerc] What is the expected number of classes a student at this college is taking?   If rounding is necessary, round to two decimal places.   [asnwerd] What is the standard deviation in the number of classes a student at this college is taking? If rounding is necessary, round to two decimal places. [answere] Which of the following interpretations of the expected value is correct? [exp]  

Which of the following are the qualities of a binomial distribution.  Check all that apply. 

Classify each of the following variables as qualitative or quantitative.  a. Brand of cell phone.  [cp] b. Number of text messages received per day. [tst] c. Hours per week a cell phone is used. [hrs]

Classify each of the following variables as qualitative or quantitative.  a. Number of listeners to a podcast  [answera] b. Student number  [answerb] c. Depth of a lake. [answerc]

Classify the following random variable according to whether it is discrete or continuous.the number of caramel candies in a box

A college wants to determine the mean amount of credit card debt their students have.  How many students should they poll to determine the mean amount of credit card debt to within $25 at 95% confidence.  Assume that a previous study indicated that the standard deviation in the amount of credit card debt has been estimated to be $275.

A school wants to randomly choose one student to speak at an assembly.  There are [x] sophomores, [y] juniors, and 15 seniors that volunteer.  If one student is chosen at random, what is the probability that the student is a sophomore? Enter your response rounded to three decimal places in the format 0.XXX.  If you do not use the correct format your response will be considered incorrect.