**Presidents and First Ladies' Ages**The following table presents the ages of the last 10 U.S. presidents and their wives on the first day of their presidencies.| President and First Lady | His Age | Her Age ||---------------------------------------|---------|---------|| Donald and Melania Trump | 70 | 46 || Barack and Michelle Obama | 47 | 45 || George W. and Laura Bush | 54 | 54 || Bill and Hillary Clinton | 46 | 47 || George and Barbara Bush | 64 | 63 || Ronald and Nancy Reagan | 69 | 59 || Jimmy and Rosalynn Carter | 52 | 49 || Gerald and Betty Ford | 61 | 56 || Richard and Pat Nixon | 56 | 56 || Lyndon and Lady Bird Johnson | 55 | 50 |**Part 1 of 4**(a) Compute the least-square regression line for predicting the president’s age from the first lady’s age. Round the slope and intercept values to at least four decimal places.This activity involves using a TI-83 calculator to perform the calculation.(Note: Additional instructions appear to indicate that students should send data to Excel for processing or analysis.)

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Answered: Presidents and first ladies: The…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in millimeters of mercury (mmHg), for a sample of 10 adults. The following table presents the results. Use a TI-84 calculator to answer the following. Diastolic Systolic Diastolic Systolic 134 87 118 115 130 76 113 77 116 70 123 77 133 91 119 69 112 75 Based on results published in the Journal of Human Hypertension Send data to Excel If the systolic pressures of two patients differ by 16 millimeters, by how much would you predict their diastolic pressures to differ? Round the answer to three decimal places. Their diastolic pressures would differ by millimeters. X $ Part: 3/4 Part 4 of 4 Predict the diastolic pressure for a patient whose systolic pressure is 140 millimeters. Round the answer to one…
c) A skilled typist, on routine work, kept a record of mistakes made per day during 300 workers Mistakes per Day 1 3 4 6 No. of days 143 90 42 12 9.
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Construct the scatterplots Age of a person, in years 11 12 13 14 15 16 17 18 19 20 Weight, in kilograms 40 42 38 35 45 51 48 48 50 47
How long does it take to finish the 1161-mile Iditarod Dog Sled Race from Anchorage to Nome, Alaska? Finish times (to the nearest hour) for 57 dogsled teams are shown below. 261 271 236 244 279 296 284 299 288 288 247 256 338 360 341 333 261 266 287 296 313 311 307 307 299 303 277 283 304 305 288 290 288 289 297 299 332 330 309 328 307 328 285 291 295 298 306 315 310 318 318 320 333 321 323 324 327 USE SALT For this problem, use five classes. (a) Find the class width. 25 236 261 286 311 336 (b) Make a frequency table showing class limits, class boundaries, midpoints, frequencies, relative frequencies, and cumulative frequencies. (Round your relative frequencies to two decimal places.) Class Limits Class Boundaries Midpoint Frequency I I I - 260 285 310 335 360 - Relative Cumulative Frequency Frequency
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How long does it take to finish the 1161-mile Iditarod Dog Sled Race from Anchorage to Nome, Alaska? Finish times (to the nearest hour) for 57 dogsled teams are shown below. 261 271 236 244 279 296 284 299 288 288 247 256 338 360 341 333 261 266 287 296 313 311 307 307 299 303 277 283 304 305 288 290 288 289 297 299 332 330 309 328 307 328 285 291 295 298 306 315 310 318 318 320 333 321 323 324 327 For this problem, use five classes. (a) Find the class width. (b) Make a frequency table showing class limits, class boundaries, midpoints, frequencies, relative frequencies, and cumulative frequencies. (Give relative frequencies to 2 decimal places.)
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