Prior to the start of the season, it was expected that audience proportions for the four major news networks would be CBS- 28%, NBC -35%, ABC- 22%, and BBC- 15%. A recent sample of homes yielded the following viewing audience data. Network            Number of Homes CBS                         850 NBC                         980 ABC                         670 BBC                         500 We want to determine whether or not the recent sample supports the expectations of the number of homes of the viewing audience of the four networks. a. State the null and alternative hypotheses to be tested. b. Compute the test statistic. c. The null hypothesis is to be tested at a 5% level of significance. Determine the critical value for this test. d. What do you conclude?

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.