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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. 

Classify the following random variable according to whether it is discrete or continuous. The number of players on a football team. 

Suppose you are the part of a large sports club.  You wish to choose a random sample of 10 club members to poll regarding the game schedule for the club.  You have the ordered numbered list of the club members, including their cell phone numbers and local addresses.  Which of the following procedures could you use to obtain a random sample of 10 club members.  Choose all that apply. 

Find the area under the standard normal curve to the right of z = 1.25.

It is claimed that 37.8% of all American Adults have visited a National Park.  You decide to test this claim.  How many American Adults should you poll to be sure that the Central Limit Theorem will apply in your work? Enter the answer in the space provided below. 

Classify each of the following quantitative variables as either continuous or discrete.  a. Time it takes to read a newspaper article [a] b. Number of paragraphs in the newspaper article. [b]

About 16% of applicants are accepted to State University and about 24% of applicants are accepted to State College.  Assuming that the acceptances are independent, what is the probability that a student is accepted to both State University and State College?

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]

Find the area under the standard normal curve to the right of z = 2.06. 

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]