D Question 26 2.38 pts In the 1960 presidential debate between John F. Kennedy and Richard Nixon, a sample of individuals who watched the debate on television indicated that the number of viewers who believed Kennedy won the debate was much larger than the number who believed that Nixon won. This evidence has been used to support the idea that Kennedy's debate performance helped him win the election. It has been argued that this evidence is problematic because young people were more likely to already support Kennedy, and they were also more likely to watch the debate on TV, whereas older people were more likely to support Nixon, but also more likely to listen to the debate on the radio. If this critique is true, the sample of tv viewers suffers from which problem? O Selection bias Systematic error O Non-response bias O Cluster errorD Question 27 2.38 pts An environmental scientist collects a sample of 10 pH readings from a large pond. She wants to determine whether the mean pl is greater than 7. What should be the alternative hypothesis be? The sample mean is greater than 7 O The population mean is less than or equal to 7 O The sample mean is less than or equal to 7 O The population mean is greater than or equal to 7 Previous NextCapture 11 1sa D Question 28 2.38 pts A local TV station has an office in downtown Louisville. To gauge opinion on a mayoral race, they set up a camera on the sidewalk outside of the office and interview several passersby. Which of the following methods are they using? O Simple random sampling O Cluster sampling O Systematic sampling Convenience sampling Nowt * PreviousD Question 29 Time Ru 2 Minut Lenovo claims that one of its laptop models lasts 5 years on average. A researcher conducts a hypothesis test at the 10% level with the null hypothesis that this statement is true. The p-value is 0.01. Does the researcher reject the null hypothesis? O No Yes Previous Next Not saved Submit QuizD Question 30 A researcher wants to test the hypothesis that the average number of miles that a 2010 Honda Civic can drive after its gas meter reads as empty is greater than 30. She collects data from a sample of 50 cars and finds a sample mean of 37. She assumes the standard deviation is 8 based on the literature about car manufacturing. What is the test statistic (Z-score)? 6.19 O 4.55 O 1.99 O 2.86 NextD Question 32 A researcher has a dataset that contains information on the weight of a variety of types of fish and possible determinants of weight. She runs a simple regression using weight in grams as the dependent variable and length in cm as the independent variable and obtains the results below. For a particular fish, the model predicts a weight of 503 grams, but the true weight is 510. What is the residual for this observation? O -14 07 O -7 O 14 Previous Next Not saved Sunit QuizD Question 33 2 The least squares method minimizes the sum of which of the following? O The squared difference between the fitted value and the true value O The covariance O The difference between the fitted value and the true value The correlation coefficient Previous Next Not saved Submit QuizD Question 34 2 Minu If we ran a regression between the number of miles a car has been driven and its selling price, what would we expect to be the sign on mileage? O Not enough information to say O Positive O Zero Negative Previous Thext Not saved Submit QuizD Question 35 2 Min What is the relationship the following two variables have? Y 10 100 1,000 10,000 100,000 1,000,000 X 1 2 3 4 5 6 O Positive and linear O Negative and linear O Negative and nonlinear Positive and nonlinear . Previous Not saved Submit QuizD Question 37 2.38 pts Time 1 Mir A researcher collects a dataset that has the ACT and SAT scores for a sample of students who took both tests. She is interested in the relationship between scores for individuals. If one student has a higher ACT score than another, how likely is it that her SAT score is also higher. Which of the following values is she most interested in? O Variance O Mean ACT and SAT score O Standard deviations of ACT and SAT scores Correlation coefficient between ACT and SAT scores Previous NextD Question 39 Time Running: A population is normally distributed with a mean of 5,398 and standard deviation of 6.71. A researcher collects a sample of 1.698 observations. Approximately, what is the variance of observations in the population? O 45 209 112 O 11 . Previous Next Not saved Submit QuizD Question 40 As a general guideline, the goal of research is to O Reject the alternative hypothesis O Identify the null hypothesis Reject the null hypothesis O Accept the null hypothesis * Previous Next Not saved Submit Quiz