A magazine publisher is studying the influence of type style and darkness on the readability of her publication. Each of 12 persons has been randomly assigned to one of the cells in the experiment, and the data are the number of seconds each person requires to read a brief test item. For these data, use the 0.05 level of significance in drawing conclusions about the main and interactive effects in the experiment. Determine the 95% confidence interval for the population mean for each factor level. (Use data file XR12099.)
Answer to relevant QuestionsTed and Luke Thorndike have been approached by several local racquetball players, each of whom would like to be sponsored by Thorndike Sports Equipment during regional tournaments to be held during the next calendar year. In ...If a table of expected frequencies differs very little from the frequencies that were observed, would the calculated chi-square be large or small? Why? It has been reported that 8.7% of U.S. households do not own a vehicle, with 33.1% owning 1 vehicle, 38.1% owning 2 vehicles, and 20.1% owning 3 or more vehicles. The data for a random sample of 100 households in a resort ...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. Customers of the Sky Mountain Grocery chain are routinely asked at the checkout whether they prefer paper or plastic bags for their purchases. In a recent study, researchers observed the type of bag specified and surveyed ...
Post your question