In a study of 250 adults the average heart rate was 70 bpm assume the population of heart rates is known to be approximately normal with a standard deviation of 12 bpm what does a margin of error of 2 for the 98% confidence interval of the average beats per minutes mean?
There is a a 1% chance that the population mean is less than 70 bpm.
There’s a 1% chance that the population mean is more than 70 bpm.
There is a 99% chance that the population mean is between 58 and 82 bpm.
There is a 99% chance that the population mean is between 68 and 72 bpm.

Abari owns 100 shares of stock a and 45 shares of stock b. for the past month, his stocks have been fluctuating inversely. stock a decreased by m cents per share and stock b increased by n cents per share. which equation can be used to find the total change in value of jabari's shares per month?

Suppose that a customer is purchasing a car. he conducts an experiment in which he puts 10 gallons of gas in the car and drives it until it runs out of gas. he conducts this experiment 15 times on each car and records the number of miles driven. full data set car 1 238238 216216 205205 212212 240240 274274 297297 252252 260260 247247 257257 243243 296296 243243 290290 car 2 245245 204204 215215 209209 251251 165165 221221 295295 172172 287287 268268 305305 320320 260260 297297 describe each data set, that is determine the shape, center, and spread. sample mean for car 1 x overbar equalsx=216216 mi / 10 gal (type an integer or decimal rounded to one decimal place as needed.) sample mean for car 2 x overbar equalsx=209209 mi / 10 gal (type an integer or decimal rounded to one decimal place as needed.)

What is the inverse of the function fx = 2x-10