Answers: at least 75. at least 89. approximately 68. approximately 95. Question 8 1 out of 1 points Suppose the wait through immigration at JFK Airport in New York is thought to be bell-shaped and symmetrical with a mean of 22 minutes. It is known that 68 percent of travelers will spend between 16 and 28 minutes waiting to pass through immigration. The standard deviation for the wait time through immigration is Selected Answer: 6 minutes. Answers: 10 minutes. 6 minutes. 8 minutes. 9 minutes. Question 9 1 out of 1 points The MCAT is the admission exam that medical schools use as one of the criteria for accepting students. The exam is based on a scale of 0-45. The following data shows the MCAT scores for nine students. 32 36 29 31 30 35 34 26 30 The 35 th percentile of this data set is ________. Selected Answer: 30 Answers: 30 31 32 31. 5
Question 10 1 out of 1 points The ________ can found by subtracting the lowest value from the highest value in the data set. Selected Answer: range Answers: median standard deviation variance range Question 11 1 out of 1 points The ________ is found by first determining the index point, i = 0.5( n ), where n is the number of data points. Selected Answer: media n Answers: averag e mean media n mode Question 12 1 out of 1 points The ________ is the best measure of central tendency for categorical data. Selected Answer: mode Answers: weighted mean mode mean median Question 13 1 out of 1 points The ________ is the most common and most important measure of variability in the field of statistics. Selected
Answer: standard deviation Answers: range median variance standard deviation Question 14 1 out of 1 points The ________ is the most commonly used measure of central tendency. Selected Answer: mean Answers: standard deviation median mode mean Question 15 1 out of 1 points The ________ is the value in the data set for which half the observations are higher and half the observations are lower. Selected Answer: media n Answers: mean media n averag e mode Question 16 1 out of 1 points The ________ is the value that appears most often in a data set. Selected Answer: mode Answers: mode media
n range mean Question 17 1 out of 1 points The following data represents the ages of a household that consists of five people.
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