A study published in Applied Psycholinguistics (June 1998) compared the language skills of young children (16–30 months old) from low-income and middle-income families. A total of 260 children—65 in the low-income and 195 in the middle-income group—completed the Communicative Development Inventory (CDI) exam. One of the variables measured on each child was sentence complexity score. Summary statistics for the scores of the two groups are reproduced in the accompanying table. Use this information to sketch a graph of the sentence complexity score distribution for each income group. (Assume that the distributions are mound shaped and symmetric.) Compare the distributions. What can you infer?
Answer to relevant QuestionsRecall the American Heart Association Conference (Nov. 2005) study to gauge whether animal-assisted therapy can improve the physiological responses of heart failure patients. A team of nurses from the UCLA Medical Center ...Refer to the sanitation levels of cruise ships presented in Exercise and saved in the SHIPSANIT file. a. Give a measure of relative standing for the Nautilus Explorer’s score of 74. Interpret the result. b. Give a ...Consider the following two sample data sets, saved in the LM2_132 file: a. Construct a box plot for each data set. b. Identify any outliers that may exist in the two data sets. The Colorado Rockies play their major league home baseball games in Coors Field, Denver. Each year, the Rockies are among the leaders in team batting statistics (e.g., home runs, batting average, and slugging percentage). ...Each year, the National Highway Traffic Safety Administration (NHTSA) crash tests new car models to determine how well they protect the driver and front-seat passenger in a head-on collision. The NHTSA has developed a ...
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