Practice Problems (1-2): Sampling Distribution

1. If a multiple-choice test consists of 5 questions, each with 4 possible answers, in how many ways can a student check off an answer to each question? 2. The manufacturer of a certain brand of Wi-fi device claimed that their products have speed limit of 12, 14, 16 and 18 mbps. a. What is the population mean? Answer the succeeding questions using n = 3 without replacement and n = 2 with replacement b. How many possible samples are there? c. Construct its probability distribution. d. What is the sample mean? e. What is the standard error of the mean