A survey report states that 39% of adults visit their doctor regularly.  Suppose that 12 adults are selected at random. a) Let X represents the number of adults visit their doctor regularly.  Is X a binomial? b) What is the probability that exactly 4 adults visit their doctor regularly in such group? c) Find the mean and standard deviation for the number of adults that visit their doctor regularly in such group of 12 adults. d) Is it unusual to have 9 or more adults that visit their doctor regularly in such group of 12 adults?  Explain.

Test scores for a statistics class had a mean of 76 with a standard deviation of 3.7.  Test scores for a calculus class had a mean of 81 with a standard deviation of 5.1.  Suppose a student gets a 85 on a statistics test and a 89 on the calculus test.  On which test did the student perform better relative to the other students in each class?

The table below describes the smoking habits of a group of asthma sufferers   Non-smoker Light-smoker Heavy-smoker Total Men 330 78 117 525 Women 305 90 80 475 Total 635 168 197 1000 a) If one of the 1000 subjects is randomly selected, what is the probability that the person is a light-smoker? b) If one of the 1000 subjects is randomly selected, what is the probability that the person is a woman or light-smoker? c) If one of the 1000 subjects is randomly selected, what is the probability that the person is a light-smoker given that the person is a woman? d) If two different subjects are randomly selected, find the probability that they are both light-smokers.

Determine whether the study depicts an observational study or an experiment.A scientist was studying the effects of a new fertilizer on crop yield.  She randomly assigned half of the plots on a farm to group one and the remaining plots to group two.  On the plots in group one, the new fertilizer was used for a year.  On the plots in group two, the old fertilizer was used.  At the end of the year the average crop yield for the plots in group one was compared with the average crop yield for the plots in group two.

A survey report states that 33% of adults visit their doctor regularly.  Suppose that 12 adults are selected at random. a) Let X represents the number of adults visit their doctor regularly.  Is X a binomial? b) What is the probability that exactly 4 adults visit their doctor regularly in such group? c) Find the mean and standard deviation for the number of adults that visit their doctor regularly in such group of 12 adults. d) Is it unusual to have 8 or more adults that visit their doctor regularly in such group of 12 adults?  Explain.

A survey report states that 41% of adults visit their doctor regularly.  Suppose that 12 adults are selected at random. a) Let X represents the number of adults visit their doctor regularly.  Is X a binomial? b) What is the probability that exactly 4 adults visit their doctor regularly in such group? c) Find the mean and standard deviation for the number of adults that visit their doctor regularly in such group of 12 adults. d) Is it unusual to have 9 or more adults that visit their doctor regularly in such group of 12 adults?  Explain.

A contractor is considering a sale that promises a profit of $58,000 with a probability of 0.84 or a loss (due to bad weather, strikes, and such) of $17,000 with a probability of 0.16.  What is the expected profit?

A small computing center has found that the number of jobs submitted per day to its computers has a mean of 82 jobs and a standard deviation of 14 jobs.  What is the minimum percentage of the number of jobs will be submitted between 40 and 124 per day?  Also, name the rule that you used in answering this question.

Use the side-by-side boxplots below to answer the question. The boxplots summarize the number of sentenced prisoners by state in the Midwest and West.Based on the boxplot for the Midwest, which of the following is true?

Sam Jones ran as a supporter of the legacy and policies of Huey P Long.