3 years ago

3/8 converted to a decimal

1 answer:

5 0

Divide 3 by 8 (3/8)
Solution : 0.375

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artcher [175]

Answer: The proportion of new car buyers that trade in their old car has statistically significantly decreased.

Step-by-step explanation:

Since we have given that

p = 48% = 0.48

n = 115

x = 46

So, $\hat{p}=\dfrac{46}{115}=0.40$

So, hypothesis would be

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

So, test value would be

$z=\dfrac{p-\hat{p}}{\sqrt{\dfrac{p(1-p)}{n}}}\\\z=\dfrac{0.48-0.40}{\sqrt{\dfrac{0.48\times 0.52}{115}}}\\\\z=\dfrac{0.08}{0.0466}\\\\z=1.72$

At 10% level of significance, critical value would be

z= 1.28

Since 1.28 < 1.72

So, we will reject the null hypothesis.

Hence, the proportion of new car buyers that trade in their old car has statistically significantly decreased.

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3 years ago

alukav5142 [94]

Please find attached photographs for your answer. Do comment whether it is useful or not

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3 years ago

Nimfa-mama [501]

(2,88)
(6,64)
(9,46)
(15,10)
first find y=mx+b
88=-6(2)+b
b=100
y=-6x+100
then plug for y and solve for x or vise versa.
Hopes this loves

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3 years ago

inessss [21]

D is the answer. Hope this helps!

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3 years ago

Rufina [12.5K]

Answer:

the photo is a little blurry I cannot answer the question unfortunately sorry

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3 years ago