Classify the following random variable according to whether it is discrete or continuous. The temperature of the water in a bathtub

The table below gives the results of a survey given to a random sample of credit card users living in the Los Angeles area.  They were asked their age group and whether or not they pay their credit card balance off in full each month.   Data Table Pay off fully each month Do not pay off fully each month Age 20 to 29 years 74 51 Age 30 to 39 years 72 37 Age 40 to 49 years 81 25 Age 50 and older 92 26 Answer the following based on the information in this table.  If rounding is necessary, round to three decimal places.  If a credit card user is randomly selected, what is the probability that they are aged 30 to 39 and pay their bill fully each month?  [one] If a credit card user is randomly selected, what is the probability that they are aged 40 to 49 or do not pay off their bill fully each month?  [tw] If a person who pays off their bill each month is chosen, what is the probability that they are aged 50 and older? [three]

Which of the following is the best description of a simple random sample?

A random sample of 2301 people living in Los Angeles indicated that 75 agreed with the statement, “I would like to change jobs within the next year.” Complete the following based on this information using only definitions provided in this class.  It is [un] for a person living in Los Angeles to agree with the statement because the probability of [prob] is [less].

It is claimed that 44% of all college students plan to go to graduate school.   You decide to test this claim.  What is the minimum number of college students you should 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. 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.