You receive a brochure from a large university. The brochure indicates that the mean class size for full-time faculty is fewer than 32 students. You want to test this claim. You randomly select 18 classes taught by full-time faculty and determine the class size of each. The results are shown in the table below. At a= 0.01, can you support the university's claim? Complete parts (a) through (d) below. Assume the population is normally distributed. 35 30 29 30 35 40 27 27 270 31 30 39 35 31 29 30 27 22 (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and H,? O A. Ho: H= 32 O B. Ho: H>32 O C. Ho: = 32 Haiu<32 Ha: H#32 Ha: u532 F. Ho: H232 O D. Ho: H<32 Ha: H2 32 ΟΕ H0 μ5 32 Ha: > 32 Ha: H< 32 (b) Use technology to find the P-value. P = 1.284 (Round to three decimal places as needed.)

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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.