- There were 136 movies made in Hollywood in 2011. Suppose that, for a documentary about Hollywood film crews, a random sample of five of these movies
- In Exercise 2.172 on page 114, we introduced the dataset HappyPlanetIndex. This exercise asks you to use technology to investigate more variables and
- The dataset US States has a great deal of information on the 50 states in the US, including two categorical variables and 14 quantitative variables.
- To measure the effectiveness of a new teaching method for math in elementary school, each student in a class getting the new instructional method is
- Choose one of the following datasets: USStates, Hollywood- Movies2011, All Countries, or NBA Players 2011, and then select any two quantitative
- Exercise 2.134 examined the relationship between region of the country and level of physical activity of the population of US states. From the
- From the StudentSurvey dataset, select any categorical variable and select any quantitative variable. Use technology to create side-by-side boxplots
- The Hardee’s Restaurant chain has about 1900 quickserve restaurants in 30 US states and 9 countries. Suppose that a member of the Hardee’s
- Come up with your own question you would like to be able to answer. What is the question? How might you collect data to answer this question? What
- In 100–200 words, explain to someone who has never studied statistics the purpose of multiple regression and when you would use it to analyze a
- Go to the GSS codebook at sda.berkeley.edu/GSS. Your instructor will assign a categorical response variable. Conduct a research study in which you
- Your instructor will pick a medical topic of interest to the class. Find a recent article of a medical journal that reports results of a research
- A study compares a new drug for pain relief in patients with chronic migraine against a placebo. Each patient is given both the drug and the placebo
- Give an example of a null hypothesis and an alternative hypothesis about a (a) population proportion (b) population mean.
- The instructor will assign the class a theme to study. Download recent results for variables relating to that theme from sda.berkeley.edu/GSS. Find
- A column by New York Times columnist Nicholas Kristof (August 15, 2003) discussed results of polls indicating that religious beliefs in the United
- Access the Sampling Distribution for a Sample Mean web app and select Build Own as the shape for the population distribution. By typing numbers into
- In professional baseball, basketball, and hockey in North America, the final two teams in the playoffs play a best of seven series of games.
- In Example 16, we explored the number of rolls it takes to win the game. In reality, it’s not the number of rolls but rather the time it takes to
- This activity illustrates how sampling bias can result when you use a nonrandom sample, even if you attempt to make it representative: You are in a
- Find an example of a randomized experiment from a newspaper, journal, the Internet, or some other media.a. Identify the explanatory and response
- Find an example of an observational study from a newspaper, journal, the Internet, or some other medium.a. Identify the explanatory and response
- Find an example of results of an Internet poll. Do you trust the results of the poll? If not, explain why not.
- Go to a website for an online medical journal, such as British Medical Journal (www.bmj.com). Pick an article in a recent issue.a. Was the study an
- Using the Internet, find a study about cell phone use and its potential risk when used by drivers of automobiles.a. Was the study an experiment or an
- The Guess the Correlation web app accessible at the book’s website allows you to guess the correlation r with randomly generated data points. How
- The Explore Linear Regression web app accessible at the book’s website lets you add and delete points on a scatterplot. The regression line is
- Is there a relationship between the amount of time a student studies and a student’s GPA? Access the Georgia Student Survey file on the book’s
- Is a baseball team’s earned run average 1ERA = the average number of earned runs they give up per game2 a good predictor of the number of wins that
- Access the General Social Survey at sda.berkeley.edu/GSS.a. Find the frequency table and histogram for Example 6 on TV watching. (Hint: Enter TVHOURS
- For the Mean Versus Median web app, using the option “Supply own sample” from the drop down menu, your instructor will give you a data set to
- Go to www.google.com/trends and click Explore in Depth. Look up a subject of interest to you and try to create a time plot that shows interest in the
- Is there a difference in how much males and females spend on haircuts? Access the Georgia Student Survey data file on the book’s website or use
- The Baseball’s HR Hitters file on the book’s website contains data on the number of home runs hit each season by some of baseball’s great home
- Search some publications and find an example of a graph that violates at least one of the principles for constructing good graphs. Summarize what’s
- Go to espn.go.com/mlb/teams and select a (or your favorite) team. Click Roster and then Salary. Copy the salary figures for the players into a
- Your instructor will help the class create a data file consisting of the values for class members of characteristics based on responses to a
- On a final exam that one of us recently gave, students were asked, “How would you define ‘statistics’ to someone who has never taken a
- At the GSS website, click Standard Codebook under Codebooks and then click Sequential Variable List. Find a subject that interests you and look up a
- The dataset Employed ACS contains just the subset of people in the dataset ACS who were employed (n = 431). Income gives each person’s wages or
- One of the authors of this book used to be a professional figure skater. For her project when she took introductory statistics (from another author
- Ultimate Frisbee games often begin by flipping two discs (tossing them as you would when flipping a coin), while someone calls
- People were recruited for a study on weight loss, in which participants were randomly assigned to one of four groups. Group 1 was given exercise
- A student wants to predict his score on the MCAT exam (which is being revised to include statistical concepts beginning in 2015!) and wants to use
- Common wisdom says that every dog year corresponds to 7 human years, so the human equivalent maturity level of a dog can be found by multiplying a
- Is percentage of the national budget spent on health care associated with life expectancy for countries?We have learned a lot of methods in this
- What percentage of Americans support samesex marriage?We have learned a lot of methods in this course, some of which are given below. State which
- Does average number of ounces of alcohol consumed each week, per person, differ by class year (First Year, Sophomore, Junior, Senior) among college
- Is there an association between whether or not a person is smiling and whether or not the sun is shining?We have learned a lot of methods in this
- How many times a day do humans urinate, on average?We have learned a lot of methods in this course, some of which are given below. State which
- Do people drive less (fewer miles) when gas prices are higher?We have learned a lot of methods in this course, some of which are given below. State
- In one of his adventures, Sherlock Holmes found footprints made by the criminal at the scene of a crime and measured the distance between them. After
- Every week during the Vietnam War, a body count (number of enemy killed) was reported by each army unit. The last digits of these numbers should be
- The Career Planning Office is interested in college seniors' plants and how they might relate to their majors. A large number of students are wrveyed
- Researchers were commissioned by the Violence In Children€™s Television Investigative Monitors (VICTIM) to study the frequency of
- The Hawaiian Planters Association is developing three new strains of pineapple (call them A, B, and C) to yield pulp with higher sugar content.
- Anthropologists have found two burial mounds in the same region. They know that several different tribes lived in the region and that the tribes have
- In Exercise E.5 we find that males have a higher average yearly income than females, in Exercise E.6 we find that males work more hours per week than
- Answer the following questions using EmployedACS, a subset of ACS that only includes people who are employed.(a) Construct a graph to visualize the
- (a) Use the ACS dataset to create a plot for the overall age distribution in the US, and comment on the distribution.(b) Give and interpret a 95%
- Of the n = 1000 people in ACS, 761 are White, 106 are Black, 70 are Asian, and 63 are other races. The sample proportion of people who have health
- The dataset Employed ACS contains just the subset of people in the dataset ACS who were employed (n = 431), and includes HoursWk, the usual number of
- The Married variable in ACS codes whether each respondent is married (1) or not (0).(a) In the ACS dataset, there are 825 people who are 15 years of
- In our sample of 1000 people, 861 have health insurance and 139 do not.(a) Use bootstrapping to generate a 90% confidence interval for the proportion
- The US Census Bureau provides a document to assist people with statistical inference using the data from the American Community Survey. Below is an
- Daniel Webster, a first-term Republican congressman from Florida, sponsored the relevant legislation to eliminate the American Community Survey. Part
- The GRE (Graduate Record Exam) is like the SAT exam except it is used for application to graduate school instead of college. The mean GRE scores for
- Data 2.4 on page 68 introduces the dataset FloridaLakes and discusses the correlation between the acidity (pH) for a sample of n = 53 Florida lakes
- Table C.1 shows a two-way table for Servers A, B, and C and for whether a credit/debit card or cash was used for payment (yes for a credit or debit
- Use the information in Table C.1 to compute and interpret a 95% confidence interval for the proportion of bills paid with a credit card.Table
- Use the information in Table C.1 to determine whether the sample provides evidence of a difference between Servers B and C in the proportion of bills
- Table C.2 gives summary statistics for the tip percentage based on whether or not a credit card was used. In the sample, which method of payment has
- Table C.3 gives summary statistics for the size of the bill based on whether or not a credit card was used. In the sample, which method of payment
- Studies suggest that when people mentally rehearse a physical action, they engage similar neural and cognitive operations as when they actually
- Assume that the mean number of free throws attempted by teams in all NBA games is 25.0 (based on a very large number of games over the past 10
- Assume that the proportion of free throws made by all NBA players is about 0.756 (based on many free throw attempts over a 10 year period).The data
- In Example C.4 on page 442 we see that the Heat tends to get more free throw attempts (on average) when playing games at home than on the road. Does
- How many more (or fewer) successful free throw points do the Heat tend to make (on average) at home games compared to their road games?The data in
- Data 2.3 on page 66 describes a dataset about patients being admitted to an Intensive Care Unit at a large hospital. We use the patients for whom
- Data 2.11 on page 111 describes a dataset that gives nutrient levels in people’s blood as well as information about their eating habits. We use the
- (a) The area below z = −2.10(b) The area above z = 1.25Find the specified areas for a N(0, 1) density.
- (a) The area below z = 1.68(b) The area above z = 2.60Find the specified areas for a N(0, 1) density.
- (a) The area to the left of the endpoint is about 0.60.(b) The area to the left of the endpoint is about 0.02.Find endpoint(s) on a N(0, 1) density
- (a) The area to the left of the endpoint is about 0.25.(b) The area to the right of the endpoint is about 0.08.Find endpoint(s) on a N(0, 1) density
- Find endpoints of a t-distribution with 5% beyond them in each tail if the sample has size n = 25.Assume the sample is a random sample from a
- Find endpoints of a t-distribution with 1% beyond them in each tail if the sample has size n = 12.Assume the sample is a random sample from a
- Find the area in a t-distribution to the right of 2.75 if the sample has size n = 10.Assume the sample is a random sample from a distribution that is
- Find the area in a t-distribution to the left of −1.50 if the sample has size n = 24.Assume the sample is a random sample from a distribution that
- The NutritionStudy dataset includes a variable indicating the number of grams of fiber consumed per day by the participants. In the sample, the mean
- Phone A recent study shows that 17% of a random sample of 1954 cell phone owners do most of their online browsing on their phone. The standard error
- A standardized test statistic is given for a hypothesis test involving proportions (using the standard normal distribution) or means (using the
- A standardized test statistic is given for a hypothesis test involving proportions (using the standard normal distribution) or means (using the
- A standardized test statistic is given for a hypothesis test involving proportions (using the standard normal distribution) or means (using the
- Use data collected at a retail store to estimate the average amount of money people spend in the store.Identify the method of analysis needed to
- Use results collected at a supermarket to see whether there is a difference in the average amount of time customers have to wait in line between two
- Use data from an experiment on mice to see if there is evidence that mice fed a high-sugar diet are more likely to be classified as insulin-resistant
- Use data collected at an online shopping site to estimate the proportion of people visiting the site who make a purchase.Identify the method of