Life Essay

568 WordsNov 1, 20133 Pages
AP Statistics: CH. 1 REVIEW – UNIVARIATE DATA Describing Data – Numerically and Graphically COMPLETE #1-13 in your notebook. 1. A distribution of 10 scores has a median of 88. If the highest score increases by 5 points, what will be the value of the median? 2. A distribution of 12 measurements has a mean of 32 cm. If the largest measurement increases by 6cm, what will be the value of the mean? 3. A distribution of 8 ages at a summer camp has a mean age of 14 years old and a median of 16 years old. Suppose the same group of campers is still together three years from now, what will be the value of the mean age? The median age? 4. Name three different measures of spread. 5. The variance of a sample of data has been determined to be equal to 1,830. The standard deviation is: 6. Classify the following variables as categorical (C) or quantitative (Q). For each Quantitative variable, also classify it as (D) discrete or (S) continuous. a) birth city b) a person’s height c) average miles per gallon of a car d) favorite ice cream flavor e) number of keys on a key chain f) a person’s height 7. The following back-to-back stemplot shows the lifetime in hours of several Longlife and Everbright light bulbs. Longlife Everbright 71 72 5 6 3 1 0 73 1 Key: 72|5 = 725 hours 9 9 8 7 6 2 74 6 9 7 3 0 75 2 76 2 2 5 7 77 1 1 3 4 6 8 1 78 a) What is the longest that any light bulb lasted? b) Compare the two distributions. 8. The graph below displays the score of 32 students on a recent exam. Scores on

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