Employees in a production department assemble the products, then submit them in batches of 25 for quality inspection. The number of defectives in each batch of a random sample of 50 recently produced batches is shown below. At the 0.01 level, test whether the population of x = the number of defectives in a batch could be Poisson distributed with λ = 2.0.
Answer to relevant QuestionsGiven the information in Exercise 13.20, use the 0.05 level in testing whether the number of defectives in each batch of n = 25 could be binomially distributed with π = 0.1. In exercise The outstanding balances for 500 credit-card customers are listed in file XR13026. Using the 0.10 level of significance, examine whether the data could have come from a normal distribution. Researchers in a California community have asked a sample of 175 automobile owners to select their favorite from three popular automotive magazines. Of the 111 import owners in the sample, 54 selected Car and Driver, 25 ...For the following data obtained from four independent samples, use the 0.025 level in testing H0: π1 = π2 = π3 = π4 versus H1: At least one population proportion differs from the others. n1 = 150, p1 = 0.30 n2 = 80, p2 = ...A random sample of 10 observations has been drawn from a normal population, and the sample variance is found to be s2 = 19.5. Determine the 98% confidence interval for σ2.
Post your question