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ivann1987 [24]
3 years ago
11

A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students attended the opening night midni

ght showing of the latest Harry Potter movie. She surveys 84 of her students and finds that 11 of them attended the midnight showing. At a 1% level of significance, an appropriate conclusion is:
Mathematics
2 answers:
jenyasd209 [6]3 years ago
7 0

20% of Evergreen Valley college students attended the opening night midnight showing of the latest harry potter movie.

Alex17521 [72]3 years ago
4 0

Answer: It is believed that exactly 20% of Evergreen Valley college students attended the opening night midnight showing of the latest harry potter movie.

Step-by-step explanation:

Since we have given that

n = 84

x = 11

So, \hat{p}=\dfrac{x}{n}=\dfrac{11}{84}=0.13

p = 0.20

So, hypothesis:

H_0:p=\hat{p}\\\\H_a:\hat{p}

so, test statistic value would be

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\z=\dfrac{0.13-0.20}{\sqrt{\dfrac{0.2\times 0.8}{84}}}\\\\z=-1.604

At 1% level of significance, critical value would be

z= 2.58

Since 2.58>-1.604

So, We will accept the null hypothesis.

Hence, It is believed that exactly 20% of Evergreen Valley college students attended the opening night midnight showing of the latest harry potter movie.

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luda_lava [24]

Answer:

x = 2

Step-by-step explanation:

1 - Rewrite

6 - 2/3 (x+5) = 4x

2 - Distribute

6 - 2/3x + 10/3 = 4x

3 - Combine like terms and get x alone

6 10/3 - 2/3x = 4x

           +2/3x  +2/3x

          6 10/3 = 4 2/3x

------------------------------- Convert to decimals

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-------------------------------- Divide both sides by 4.33...x

2 = x

Hope this helps :)

3 0
3 years ago
Triangle ABC has vertices A0,0), B(3,2)and C(0,4). The triangle may be classified as
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Answer:

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Step-by-step explanation:

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5 0
3 years ago
Po's dog weighs 24 and 65 lb Ricky's dog weighs 42 LB how much more does Ricky's dog weigh
arsen [322]
41 lb
work: 65 - 24 = 41
you're welcome
8 0
3 years ago
Which expression is equivalent to<br> (6x-9x) - (2x - 3)?
NikAS [45]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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How do you simplify 15/40​
Katyanochek1 [597]

Answer:3/8

Step-by-step explanation:

The simplest form of  

15 /40  is  3 /8 .

Steps to simplifying fractions

Find the GCD (or HCF) of numerator and denominator

GCD of 15 and 40 is 5

Divide both the numerator and denominator by the GCD

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Reduced fraction:  

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Therefore, 15/40 simplified to lowest terms is 3/8.

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