Problem-Solving and Data Analysis

Chief Editor

Mar 27, 2024

Take all 3 MCQs in interactive quiz mode with timer and progress tracking

Texting behavior Talks on cell phone daily Does not talk on cell phone daily Total Light 110146256 Medium 139164303 Heavy 16674240 Total 415384799 In a study of cell phone use, 799 randomly selected US teens were asked how often they talked on a cell phone and about their texting behavior. The data are summarized in the table above. If one of the 799 teens surveyed is selected at random, what is the probability that the teen talks on a cell phone daily?

Texting behavior	Talks on cell phone daily	Does not talk on cell phone daily	Total
Light	110	146	256
Medium	139	164	303
Heavy	166	74	240
Total	415	384	799

Difficulty: Easy

\frac{1}{799}

\frac{415}{799}

\frac{384}{415}

\frac{384}{799}

$$2, 9, 14, 23, 32$$ What is the mean of the data shown?

Difficulty: Easy

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32

Value Frequency 1 $a$ 2 2$a$ 3 3$a$ 4 2$a$ 5 $a$ The frequency distribution above summarizes a set of data, where $a$ is a positive integer. How much greater is the mean of the set of data than the median?

Difficulty: Hard

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