Question: Refer to Exercise 6.55. In exercise a. To what populations are the conclusions obtained in Exercise 6.55 relevant? b. A more precise estimate of the

Refer to Exercise 6.55.
In exercise

a. To what populations are the conclusions obtained in Exercise 6.55 relevant?
b. A more precise estimate of the mean expenditure for female candidates is requested. How many female candidates would need to be included in the new study to estimate the mean expenditure using a 95% confidence interval having a width of at most $ 10?

Candidate 2 3 4 5 678 9 10 12 13 14 15 16 17 18 19 20 Female 169 206 257 294 252 283 240 207 230 183 298 269 256 277 300 126 318 184 252 305 Male 289 334 278 268 336 438 388 388 394 394 425 386 356 342 305 365 355 312 209 458

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