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2 years ago

a student is reading a fictional book at about 300 words per a minute. convert this rate to words per second

Mathematics

1 answer:

NeTakaya2 years ago

6 0

300words/min
1min= 60 secs
300words/60secs= 5
5words/second is your answer

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3 years ago

US average math SAT scores follow a normal distribution with a mean of 505 and a standard deviation of 112. A sample of 64 enter

Hitman42 [59]

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The claim that the scores of UT students are less than the US average is wrong

Step-by-step explanation:

Given : Sample size = 64

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Mean = 505

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To Find : Test the claim that the scores of UT students are less than the US average at the 0.05 level of significance.

Solution:

Sample size = 64

n > 30

So we will use z test

$H_0:\mu \geq 477\\H_a:\mu < 477$

Formula : $z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

$z=\frac{505-477}{\frac{112}{\sqrt{64}}}$

$z=2$

Refer the z table for p value

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So, we accept the null hypothesis

Hence The claim that the scores of UT students are less than the US average is wrong

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3 years ago