A regional survey of 561 companies asked the vice president of operations how satisfied he or she was with the software support received from the computer staff of the company. Suppose 187 of the 561 vice presidents said they were satisfied. What is the 99% confidence interval for the proportion of the population of vice presidents who would have said they were satisfied with the software support if a census had been taken?

Q: 2. Suppose that you take a random sample of 360 people who voted in the last election in a heavily…

A:

Q: uring an election, Kevin and Britney took a poll of 1,200 voters, and asked what the most…

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Q: calculate the 95% confidence interval for the Presidential performance approval rating for a survey…

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Q: one city, 79.6% of the 8500 students surveyed said they eat at the school cafeteria. Find the 95%…

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Q: Among college students, the proportion p who say they’re interested in their congressional…

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A: The chi-square test statistic is χ2=7.77 and the P-value is between 0.02 and 0.025.

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Q: Among college students, the proportion p who say they’re interested in their congressional…

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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.