Sun. Mon. Tues. Wed. Thurs. Fri. Sat. number of births 13 24 19 25 15 21 15 probability 0.098 0.181 0.143 0.189 0.113 0.159 0.113 Based on this one-week sample, what is the probability that a baby was born on a Tuesday and what is the probability of a baby being born on a weekday? Based on this one-week sample, compare the probability of a baby being born on a weekend versus a weekday.

Use the following results from a test for marijuana use. Among 144 subjects with positive test​ results, there are 21 false positive results. Among 139 negative test​ results, there are 4 false negative results. a. How many subjects are included in the​ study? b. How many of the subjects had a true negative​ result? c. What is the probability that a randomly selected test subject had a true negative​ result?

. Giving a test to a group of students, the grades and gender are summarized below. If one student was chosen at random, find the probability that the student was female or earned a B.   A B C Total Male 8 18 13 39 Female 10 4 12 26 Total 18 22 25 65

Question 46 (page 181) DI, Richmond, a psychologist, is studying the daytime television viewing habits of college students. She believes 45% of college students watch soap operas during the afternoon. To further investigate, she selects a sample of 10. a) Develop a probability distribution for the number of students in the sample who watch soap operas. b) Find the mean and the standard deviation of this distribution. c) What is the probability of finding exactly four students who watch soap operas? d) What is the probability less than half of the students selected watch soap operas? Question 56 (page 182) According to sales information in the first quarter of 2016, 2.7% of new vehicles sold in the United States were hybrids. This is down from 3.3% for the same period a year earlier. An analyst's review of the data indicates that the reasons for the sales decline include the low price of gasoline and the higher price of a hybrid compared to similar vehicles. Let's assume these…

Refer to the sample data for pre-employment drug screening shown below. If one of the subjects is randomly selected, what is the probability that the test result is a false positive? Who would suffer from a false positive result? Why? Pre-Employment Drug Screening Results Positive test result Negative test result Drug Use Is Not Indicated Drug Use Is Indicated Subject Uses Drugs 37 4. Subject Is Not a Drug User 17 35 The probability of a false positive test result is

An auditor for Health Maintenance Services of Georgia reports 40 percent of policyholders 55 years or older submit a claim during the year.  Twenty policyholders are randomly selected for company records. (Binomial Dist.)  a. How many of the policyholders would you expect to have filed a claim within the last year? ie. The mean value.  b. What is the probability that 10 of the selected policyholders submitted a claim last year? c. What is the probability that 10 or more of the selected policyholders submitted a claim last year?

B. What is the probability a sample of 90 test takers will provide a sample mean test score within 10 points of the population mean of 515 on the mathematics part of the test. c. What is the probiotic a sample of 100 test takers will provide a sample mean test score within 10 points of the population mean of 494 on the writing part of the test.

Refer to the sample data for​ pre-employment drug screening shown below. If one of the subjects is randomly​ selected, what is the probability that the test result is a false​ positive? Who would suffer from a false positive​ result? Why?   Pre-Employment Drug Screening Results   Positive test result Negative test result     Drug Use Is Indicated Drug Use Is Not Indicated Subject Uses Drugs 42 11 Subject Is Not a Drug User 17 34

. A sample of 200 people was asked their favorite genre of music. Below are the results. Gender Rock Pop Hip-Hop Other Male 31 20 37 12 Female 17 30 19 34   If one of those people is randomly selected, find the probability that the person is a female or their favorite genre of music is Hip-hop. Round to three decimal places as needed. If one of those people is random selected, find the probability that the person’s favorite genre of music is Pop, given that the person is a male. Round to three decimal places as needed.

The table below summarizes a survey involving the relationship between living arrangements and grade point average for a group of students. If a student is selected randomly from this​ group, what is the probability that the student lives off​ campus?     On Campus At home Apartment Totals Below 2.5 97   38   44   179   2.5 to 3.5 66   26   22   114   Over 3.5 18   5   8   31   Totals 181   69   74   324