Question: Of all students enrolled at a large undergraduate university 19
Of all students enrolled at a large undergraduate university, 19% are seniors, 23% are juniors, 27% are sophomores, and 31% are freshmen. A sample of 200 students taken from this university by the student senate to conduct a survey includes 50 seniors, 46 juniors, 55 sophomores, and 49 freshmen. Using a 2.5% significance level, test the null hypothesis that this sample is a random sample. (This sample will be a random sample if it includes approximately 19% seniors, 23% juniors, 27% sophomores, and 31% freshmen.)
Answer to relevant QuestionsChance Corporation produces beauty products. Two years ago the quality control department at the company conducted a survey of users of one of the company’s products. The survey revealed that 53% of the users said the ...Consider the following contingency table, which records the results obtained for four samples of fixed sizes selected from four populations. a. Write the null and alternative hypotheses for a test of homogeneity for this ...National Electronics Company buys parts from two subsidiaries. The quality control department at this company wanted to check if the distribution of good and defective parts is the same for the supplies of parts received ...A sample of 25 observations selected from a normally distributed population produced a sample variance of 35. Construct a confidence interval for σ2 for each of the following confidence levels and comment on what happens to ...Determine the value of x2 for 23 degrees of freedom and an area of .990 in the left tail of the chisquare distribution curve.
Post your question