The numbers of polio cases in the world are shown in the table for various years.Year Number of Polio Cases (thousands)198819921996200020052007Let f(t) be the number of polio cases in thousands t years since 1980.Use a graphing calculator to draw a scattergram of the data. Is it better to model the data by using a linearor exponential model? ExponentialFind an equation of f. Hintf(t)=3501383363.21.3The number of polio cases is decreasingPredict the number of polio cases 202HintRound the coefficients to 4 decimal places.oby 25.61%Predict in which year there will be 1 case of polio. HintyearsFind the approximate half-life of the number of polio cases. Hint✓✓o per year.

The general exponential equation is represented by the equation: . Here, x is the independent…

Answered: The numbers of polio cases in the world…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Use Regression to Find and Use an Exponential Model to answer the questions: The numbers of polio cases in the world are shown in the table for various years. Year Number of Polio Cases (thousands) 350 138 1988 1992 1996 36 2000 4 2005 3.2 2007 1.3 Let f(t) be the number of polio cases in the world t years since 1980. The exponential regression equation for the data above is: f(t) = 3837.25(0.74)* Predict the number of polio cases in 2009. Hint Predict in which year there will be 1 case of polio. Find the approximate half-life of the number of polio cases. Round your answer to one decimal place. years
Question 5 of 17 View Policies Show Attempt History Current Attempt in Progress < Your answer is incorrect. Give the growth rate that corresponds to the growth factor 8. The growth rate is i eTextbook and Media Hint ! %. Remember the relationship between growth rate (expressed as a decimal) and growth factor. Save for Later Last saved 1 second ago. Saved work will be auto-submitted on the due date. Auto- submission can take up to 10 minutes.
The lecturer is interested to see what variables, if any will help determine the number of hours spent on studying statistics. Test and find any regression models that can help determine the number of hours spent on studying. (Hint run Study hrs. on…)(a) On average, how much do males study more(less) than females?(b) Do people who enjoy the Big Bang Theory impact on the number of hours studies?(c) Is age a determining factor on the number of hours studied?(d) Do students with a stronger math background study more or less? Also state how much more or less Answer all questions.. Quiz Results EQR Study Hrs Age Sex BBT MB MC AuHS LM 15 10 3 19 0 0 1 1 0 1 14 15 4 24 0 0 1 0 0 1 9 15 1 20 0 10 1 0 0 1 6 10 3 21 0 0 1 1 0 1 14 15 4 21 0 9 1 0 0 1 12 10 6 21 0 2 0 1 0 1 12 13 2 21 1 8 1 0 0 0 15 15 0 20 0 8 1 0 0 1 12 15 3 20 0 10 1 0 0 1 13 15 0.2 19 0 8 1 0 0 1 15 15 2 20 0 6 1 0 1 1 12 14 5 20 0 5 1 1 1 1 14 15 7 22 0 8 0 0 0 0 7 7 10 21 1 7 0 0 1 0 11 15…
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When using the exponentially weighted moving average for purposes of forecasting rather than smoothing, Group of answer choices the current smoothed value becomes the forecast. the previous smoothed value becomes the forecast. the next smoothed value becomes the forecast. None of the above.
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