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If a polling firm attempts to contact potential voters using only landline phone numbers, then the resulting sample is likely to be biased in terms of the age of respondents since older people are much more likely to have landline phones in their homes. This is an example of O a. selection bias O b. survivor bias O c. None of these choices O d. data error Excel's Data Validation tool can be used to control what a user can enter into a cell, limiting O a. biased data O b. the ability to commit data errors via manual entries. O c. None of these choices O d. miscalibration of sensors that automatically collect data Which of these statements is true for outliers? O a. Outliers should only be removed after careful consideration of their cause and on their effect on the insights drawn from the data. O b. Outliers should immediately be removed for accurate analysis. O c. Outliers are never data entry errors. O d. Outliers are always real data points. A simple alternative to using a dual-axis chart is to O a. use a frequency table for each variable instead O b. replace the dual-axis chart with two charts where each variable is shown on a different chart O c. make the axes contrasting colors O d. None of these choices Studies of market performance often exclude companies that collapse and only focus on successful businesses. This can distort statistics and make success seem more probable than it truly is. This is an example of O a. sample bias O b. selection bias O c. survivor bias Od. None of these choices are correct Beginning the vertical scale of a graph at a value different from zero to make increases look more dramatic is an example of O a. Simpson's paradox O b. deceptive design O.C. an unbiased data. O d. a sampling bias