You intend to estimate a population mean with a confidence interval. Your population is normally distributed and your sample size is 6. Find the critical t value that corresponds to a confidence level of 99%. (Round your answer to 3 decimal places.) t₁/₂ = ±
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- The price X (dollars per pound) and consumption y (in pounds per capita) of beef were samples for 10 randomly selected years. The following data should be used to answer the question that follows. n = 10 Ex = 36.19 Ex² = 134.17 2.9 < x < 6.2 Ey = 774.7 Iy? = 60739.23 Exy = 2832.21 %3D Using this data, a student calculated SSy = 28.43 SSx = 3.2 SSyy = 717. Which one of %3D the following represents the equation of the regression line between price and consumption O y-hat = 25.22x -13.8 O y-hat = 25.22x +13.8 O y-hat 8.88x + 453.37 O y-hat = 8.88x +45.34The price X (dollars per pound) and consumption y (in pounds per capita) of beef were samples for 10 randomly selected years. The following data should be used to answer the question that follows. n = 10 Ex = 36.19 Ix? = 134.17 2.9 s x s 6.2 Ey = 774.7 Ey? = 60739.23 Exy = 2832.21 %3D Using this data, a student calculated SSv = 28.43 Calculate a 95% confidence interval for the slope of the regression line. You only need to enter the upper limit of this confidence interval accurate to two decimal places. SSxx = 3.2 SSyy = 717 Se = 7.62 %3D %3DFind the critical value given the information below. Illustrate the curve. One-tailed test : α=0.05 , n=35
- Juan wants to estimate a population mean age of residents of a retirement community. Based on previous evidence, he believes the population standard deviation is approximately σ=7.4σ=7.4 years. Juan would like to be 99% confident that his estimate is within 1.6 years of the true population mean, and asks you to help him determine the appropriate minimum sample size. How large of a sample size should Juan use?You want to obtain a sample to estimate a population mean.you believe the population standard deviations is approximately sigmma=23.3 you would like to be 95% confidence that your estimate is within 1.8 of the true population mean . How large of sample size is required ? The z critical value is given by 1.960