**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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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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The following table lists animals that have some of the longest lifespans on earth. Does incubation or gestation time affect an animal’s average lifespan? Some animals have lifespans that average well over 100 years.Animal: Nile, Crocodile, Aldabra Giant Tortoise LakeSturgeon, Galapagos Tortoise, Bowhead Whale Average Lifespan (in Years): 100,152,152,177,211Incubation/Gestation (in Months): 3, 8, 0.25, 4.7,13.5 Is there a correlation between an animal’s gestation/incubation period and its average lifespan in years? a. Draw the scatterplot for the variables. b. Describe the relationship, if any, shown by the scatterplot. c. Calculate r, the correlation coefficient. How does the correlation coefficient compare to the relationship you saw in the scatterplot?
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
Which of the following is an example of causation? Birthdays cause people to age. Aerobic exercise causes increased heart rate April 15 causes people to pay taxes. Sunshine causes people to spend the day outdoors
A pollster wants to minimize the effect the order of the questions has on a person's response to a survey. How many different surveys are required to cover all possible arrangements if there are 12 questions on the survey? Question content area bottom Part 1 A.39 comma 916 comma 800 39,916,800 B.479 comma 001 comma 600 479,001,600 C.144 144 D.12 12
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.)
The table below shows the number of individuals infected with a disease t days after its first detected by the CDC. Days Infected Individuals 1 2 678 722 3 756 4 825 5 7 6 882 945 1017 8 1104

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