The following data were collected: Expenses per stay (rounded to the nearest dollar) 392 450 356 358 460 397,446,472,481,380 454,440 468 476,418

question 15 Determine the interquartile interval.

Question 16 Can we say that over 75% of tourists spend less than $460 during their stay? Explain.

Question 17 Is it safe to say that over 25% of tourists spend less than $392 during their stay? Explain.

Question 18 Are there any outliers? Explain.

Question 19 Applying the Chebychev rule, what range, around the mean, covers at least 60% of the data?

Question 20 Applying the Chebychev rule, what proportion of tourists is in the range (x -2s, x +2s)? Calculate the interval.