nơ. Calculate a 95% confidence interval for µ for each of the following situations: 120, a = 99.2, s = 2.12 110, a = 72.1, s = 4.26 85, I = 71.7, s 3.62 85. 7 = 73.4. 2.14 VI VI VI VI

Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard deviation, σ, equal to 27. Approximately what percent of the population would be between 90 and 171? 1. 95% 2. 81.5% 3. 47.5% 4. 68% 5. 34% 6. 13.5%

2.18 2.42 2.57 2.89 Suppose the data represent the inches of rainfall in April for a certain city over the course of 20 years. 4.79 D 0.53 0.76 1.23 1.37 1.86 3.37 3.66 3.88 4.09 4.49 5.04 5.36 5.79 Given the quartiles Q, = 2.020, Q, = 3.280, and Q3 = 4.640, compute the interquartile range, IQR. 3.19 6.08 IQR =D (Round to three decimal places as needed.)

Answer A B C