The manager of an automobile dealership is considering a new bonus plan designed to increase sales volume. Currently, the mean sales volume is 14 automobiles per month. The manager wants to conduct a research study to see whether the new bonus plan increases sales volume. To collect data on the plan, a sample of sales personnel will be allowed to sell under the new bonus plan for a one-month period. (a) Develop the null and alternative hypotheses most appropriate for this situation. o Ho: u > 14 H: us 14 O Ho: u = 14 H:u + 14 O Ho: u< 14 Hiuz 14 O Ho: us 14 Hiu > 14 o Ho: u2 14 HgiH< 14 (b) Comment on the conclusion when H. cannot be rejected. O we can conclude that there is statistical evidence that the new bonus plan increases the mean monthly sales volume. O we can conclude that there is not statistical evidence that the new bonus plan increases the mean monthly sales volume. (c) Comment on the conclusion when H. can be rejected. O we can conclude that there is statistical evidence that the new bonus plan increases the mean monthly sales volume. O we can conclude that there is not statistical evidence that the new bonus plan increases the mean monthly sales volume.

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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.