The percent of college​ students' marijuana use for a sample of 95,411 students is shown in the accompanying pie chart. ​What is the probability of Randomly selecting a student who never used marijuana?   ​(Round to one decimal place as​ needed.)

If the prevalence of a certain condition in the population is 0.4. What is the probability that exactly one person out of a sample of ten has the condition? Write as a proportion rounded to two places.

Organ Donors USA Today provided information about a survey of 5100 adult Internet users. Of the respondents, 2346 said they are willing to donate organs after death. In this survey conducted for Donate Life America, 100 adults were surveyed in each state and the District of Columbia, and results were weighted to account for the different state population sizes.  a. What percentage of respondents said that they are willing to donate organs after death? b. Based on the poll results, what is the probability of randomly selecting an adult who is willing to donate organs after death? c. What term is used to describe the sampling method of randomly selecting 100 adults from each state and the District of Columbia?

In an​ experiment, college students were given either four quarters or a​ $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts​ below.   Purchased Gum Kept the Money   Students Given Four Quarters 33 13   Students Given a​ $1 Bill 15 30 a. Find the probability of randomly selecting a student who spent the​ money, given that the student was given four quarters. b. Find the probability of randomly selecting a student who kept the​ money, given that the student was given four quarters. c. What do the preceding results​ suggest?choose below     A. A student given four quarters is more likely to have kept the money than a student given a​ $1 bill.   B. A student given four quarters is more likely to have kept the money.   C. A student given four quarters is more likely to have spent the money than a student given a​ $1 bill.   D. A student given four quarters is more…

Use the standard normal probability chart, included in this exam, to look up the following numbers and draw the graph for each one. a. - .0492 b. 1.6 c. 1.06 d. -5.2

Using the following two way frequency table, answer the following question: Have Been to Canada Have Not Been to Canada Have Been to Mexico 6 3 Have Not Been to Mexico 5 11 Find the probability that someone has NOT been to Mexico, given that they have been to Canada.

Use the data in the following table, which lists survey results from undergraduate school students. Assume that subjects are randomly selected from those included in the table. If one of the students is randomly selected, find the probability that the selected student took online courses and took in-person courses. Round three decimal places. Student Took Online Courses Yes Student took in-person courses 2800 Student have not taken in- 4460 person courses 0.748 354 0.345 O 285 No 720 140

The data on the right represent the number of traffic fatalities by seat location and gender. Determine P(female) and P(female/driver). Are the events "female" and "driver" independent? Determine P(female). P(female) = (Round to three decimal places as needed.) Driver Male Female Total 32,738 11,842 44,580 Passenger 6,346 6,395 12,741 Total 39,084 18,237 57,321

The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" In a recent year, 1116 respondents answered both questions. The summary statistics are given in the chart below. (The sample data consist of the times, in hours per week, that were given by the respondents.) Sample Sample Sample Groups size mean variance Less than 281 41.6 115.8 h.s. High school 260 43.3 96.3 Bachelor's 294 42.5 100.5 Graduate 281 44.2 108.2 Send data to Excel Based on these summary statistics, we perform a one-way, independent-samples ANOVA test to determine if there is a difference in the mean hours worked in a typical week among the four populations of workers. (a) The results of this ANOVA are given in the incomplete ANOVA table below. Complete the…

The distribution for the size of families in one U.S. city is shown below.       Size      Proportion       2             0.422      3             0.234      4             0.205      5             0.088      6             0.032      7+           0.019A family is selected at random. Find the probability that the size of the family is at least 3.