What is the most likely value of the correlation coefficient r for the sample (mv-Newton) shown in the table? ID# X (mv) Y (Newton) 1 0.1 10 0.3 30 - W N 0.5 50 0.2 20 UT 0.4 40Which of the following sampling strategies requires a random selection of a starting point followed by the selection of every Nth element in the population? O A. Stratified sampling O B. Convenience sampling C. Cluster sampling O D. Systematic samplingHow many individuals have a salary of $40,000 or less. Identify it from the list below. Salary frequency 30,000 3 40000 4 45000 2Which of the following strategies can be used to avoid confounding? O A. Matching O B. All of the above C. Blinding O D. Randomized Controlled TrialConsider that a vision researcher makes an observation that a habit of reading while swinging affects the visual acuity (i.e. sharpness of vision) in a long run. What should be this researcher's next step? Develop a hypothesis based on this observation and design experiments to test this hypothesis Develop a theory based on this observation without further research Consider it to be a law None of the aboveWhat is the mode based on the sample salary ($) data shown below? Salary frequency 30,000 3 40000 4 45000 2Which of the following variables is on an interval scale? O A. Age in years OB. Time, if measured using a 12-hour clock O C. Stages of cancer O D. Marital statusWhat is the variance for the following data values? 5 10 15 20 25 O A. 7.9 O B. 5 O C. 20 O D. 62.5Which of the following studies can be used to make generalizations or predictions about how study variables will relate to a larger population? O A. Descriptive O B. Experimental O C. Correlational O D. Both experimental and correlationalQuestion 22 An experimenter wants to study the effects of a new drug on blood pressure in a sample of 20 hypertensive adults. The study sample is randomly divided into two groups, a novel group (new drug) and a standard group (old drug). During a visit. the 1 points experimenter measures blood pressure before and after a single dose of the drug in both groups. Save A Identify the dependent variable in this drug study? O A. Blood pressure O B, Old drug O C. New drug O D. Hypertensive adults