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Surya wanted to predict the percentage of households with internet access in Bolivia based on the percentage of households with access to cooking fuel between 1990 and 2024. Access to Fuel ranges from 63.1 to 90.6, and access to the internet ranges from 463.1 to 90.6.  He found the following least squares regression equation.  yhat= -158.79 + 2.455x.  The 95% confidence interval when x = 85% is (45.09, 54.67).  Interpret the confidence interval.

Wanchuzi wanted to predict house sale prices in Pierce County, Washington, based on basement_square_feet, attached_garage_square_feet, and year built.  She took a random sample of houses for sale in 2023.  Conduct an overall F test to determine whether these variables help predict the sale price. Include the model, parameters, hypotheses, test statistic, p-value, and conclusion. Use alpha = 0.05. You don’t have to show the checking of assumptions. (However, if you notice something off with assumptions, complete the problem anyway.)

Congratulations!  You are almost done with this exam.   DO NOT end the Honorlock session until you have submitted your work to Brightspace.  Submission Instructions Use your phone to scan your answer sheet and save it as a PDF. Make sure your scan is legible!  Email the PDF to yourself or save it to the cloud (Google Drive, etc.). Click Add File at the bottom of the page. Locate and upload your exam PDF.  Click the Submit Quiz to end the exam and end the Honorlock session. 

Which of the following best describes the focus of a case study?

During adolescence, individuals often begin to think more logically about abstract ideas and enjoy debating different points of view. This growth is best categorized under which developmental domain?

Two siblings, raised in the same household but with different interests and personalities, are a good example of which developmental concept?

An adolescent who develops resilience after recovering from a serious illness is experiencing which type of contextual influence?

What is a key distinction between correlational and experimental research methods?

In an experiment studying the effects of sleep on memory, what would be considered the independent variable?

A researcher observes that older adults can improve their vocabulary with practice, even as their reaction times slow. This finding best illustrates which principle of Baltes’ lifespan perspective?