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Nuetrik [128]
3 years ago
12

A large simple random sample of people aged nineteen to thirty living in the state of colorado was surveyed to determine which o

f the mp3 players
Mathematics
1 answer:
sleet_krkn [62]3 years ago
4 0
<span>The iPhone proved to be the most used mp3 player of people living in Colorado from ages 19 to 30. The iPod was a close second. Other notable mentions were the SanDisk mp3 player and Sony's Walkman mp3 player.</span>
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A contractor is required by a county planning department to submit one, two, three, four, five, or six forms (depending on the n
Ratling [72]

Answer:

a)

k = \dfrac{1}{21}

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Step-by-step explanation:

We are given the following in the question:

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The probability is given by:

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\displaystyle\sum P(y_i) = 1\\\\\Rightarrow k(1+2+3+4+5+6) = 1\\\\\Rightarrow k(21) = 1\\\\\Rightarrow k = \dfrac{1}{21}

b) at most four forms are required

P(y \leq 4) = \displaystyle\sum^{y=4}_{y=1}P(y_i)\\\\P(y \leq 4) = \dfrac{1}{21}(1+2+3+4) = \dfrac{10}{21} = 0.476

c) probability that between two and five forms (inclusive) are required

P(2\leq y \leq 5) = \displaystyle\sum^{y=5}_{y=2}P(y_i)\\\\P(2\leq y \leq 5) = \dfrac{1}{21}(2+3+4+5) = \dfrac{14}{21} = 0.667

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