Athlete ages: a sport reporter suggests that professional baseball players must be, on average, older than professional football players, since football is a contact sport and players are more susceptible to concussions and serious injuries (www.sports.yahoo.com). One player was selected at random from each team in both professional baseball (MLB) and professional football (NFL). The data are summarized below. MLB NFL 30 32 27.5 26.16 3.94 2.78 The researchers in decided to test the hypothesis. The degree of freedom formula gives 51.83df. Test the null hypothesis at a = 0.05. Is the alternative one or two sided?

A researcher is interested in studying the connection between the time spent using electronics and the rates of depression among teenagers in the state of New York. Which of the following samples would be most representative of the population? a a group of 500 respondents from the ages of 13-19 who live in New York City b a group of 500 respondents from the ages of 13-19 who live in the state of New York c a group of 500 respondents from the ages of 13-15 who live in the United States d a group of 500 high school seniors who live in the state of New York

A social media app is conducting a study on the amount of time users spend on the app. They collect the following variables. 1. Age Years: How old they are in years? 2. Income: Monthly Income 3. Location: What country do they live in? 4. Device: Do they use an iPhone, Samsung, other? 5. Service: Who provides their mobile phone service? For example: T-Mobile, At&t, Verizon, ect 6. Hours: How many hours do they spend on the app per week. Which variable could the research construct a one proportion z-interval for? And Why would you choose that variable?

In each scenario, identify the population, the sample, and any population parameters or sample statistics that are given. In a recent study, US graduates of for-profit higher education institutions were between 4.8 and 6.7 percentage points more likely to be unemployed than those at non-profit institutions and community colleges.

Do truck drivers get into more accidents than people who drive SUVs? Researchers use police records of automobile accidents over the past year and vehicle registrations to compare the percentage of drivers of vehicles of each type that get into accidents. 1: A survey 2: An observational study that is not a survey 3: An experimental study

A statistics professor wants to determine how students' final exam scores arerelated to the quiz scores, midterm exam scores, and number of classes missed. The professor selects 12 students from his class and obtains the following data:

A sociologist is doing a study to see if there is a relationship between the age of a young adult (18 to 35 years old) and the type of movie preferred.  A random sample of 93 adults revealed the following:     Person's Age     Movie 18-23 yrs 24-29 yrs 30-35 yrs Row Total Drama 8 15 11 34 Science Fiction 12 10 8 30 Comedy 9 8 12 29 Column Total 29 33 31 93  Test whether age and type of movie preferred are independent at the 0.05 level of significance.

The second slide is the first part of the question  and the first slide is the second part of the question

Which of the following is not a common data source? A. Customer Surveys B. Social Media Platforms C. Website Traffic Logs D. Key Performance Indicators (KPIs)

The US Census Bureau collects statistics comparing the various 50 states. The following table shows the poverty rate (% of population below the poverty level) and infant mortality rate per 1,000 live births) by state. Based on these data, can we conclude the poverty and infant mortality rates by state are correlated?   State Poverty Infant Mort. Alabama,AL 15.7 9.0 Alaska,AK 8.4 6.9 Arizona,AZ 14.7 6.4 Arkansas,AR 17.3 8.5 California,CA 13.3 5.0 Colorado,CO 11.4 5.7 Connecticut,CT 9.3 6.2 Delaware,DE 10.0 8.3 Florida,FL 13.2 7.3 Georgia,GA 14.7 8.1 Hawaii,HI 9.1 5.6 Idaho,ID 12.6 6.8 Illinois,IL 12.2 7.3 Indiana,IN 13.1 8.0 Iowa,IA 11.5 5.1 Kansas,KS 11.3 7.1 Kentucky,KY 17.3 7.5 Louisiana,LA 17.3 9.9 Maine,ME 12.3 6.3 Maryland,MD 8.1 8.0 Massachusetts,MA 10.0 4.8 Michigan,MI 14.4 7.4 Minnesota,MN 9.6 5.2 Mississippi,MS 21.2 10.6 Missouri,MO 13.4 7.4 Montana,MT 14.8 5.8 Nebraska,NE 10.8 5.6 Nevada,NV 11.3 6.4 New Hampshire,NH…