The costs of three models of helicopters are shown here. Find the weighted mean of the costs of the models.
Answer to relevant QuestionsThe reported high temperatures (in degrees Fahrenheit) for selected world cities on an October day are shown below. Which measure of central tendency do you think best describes these data? If the mean of five values is 8.2 and four of the values are 6, 10, 7, and 12, find the fifth value. The expenditures per pupil for selected states are listed below. Based on these data, what do you think of the claim that the average expenditure per pupil in the United States exceeds $10,000? The average age of U.S. astronaut candidates in the past has been 34, but candidates have ranged in age from 26 to 46. Use the range rule of thumb to estimate the standard deviation of the applicants’ ages. Find the range, ...In a study of reaction times to a specific stimulus, a psychologist recorded these data (in seconds). Class limits Frequency 2.1–2.7 .......12 2.8–3.4 .......13 3.5–4.1 .........7 4.2–4.8 .........5 4.9–5.5 ...
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