3 years ago

How many student preferred math??

Mathematics

1 answer:

Zielflug [23.3K]3 years ago

4 0

The answer would be 13

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RoseWind [281]

Answer:

6/7

Step-by-step explanation:

-3 - 4 -7 -7

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3 years ago

Historically, the proportion of people who trade in their old car to a car dealer when purchasing a new car is 48%. Over the pre

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

I’m slow , can i get help on this asap please ?

makkiz [27]

140°
Pentagons add up to 540° so if you add all the degrees you get 400° and if subtracted from 540° you get 140°

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3 years ago

2.5 m<br> 9 m<br> 1<br> 24 m<br> Work out the perimeter.

deff fn [24]

Step-by-step explanation:

thirty six point five(36.5)

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