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Answer (Choose 1 answer)
A B A researcher found that 70 of the 90 people randomly selected were in favor of reducing the sales tax. Compute the 95% confidence interval estimate for the population proportion of people who favor of reducing the sales tax.
Let z_0.025 1.96; z_0.05-1.645; z_0.005=2.575.Calculations need to be rounded to 4 decimal places.
A. 0.2222±0.0721
B. None of the others
C. 0.7778 ± 0.0859
D. 0.7778 ± 0.0721
