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Vinil7 [7]
3 years ago
8

What is 1/3 of 18 Fraction problems

Mathematics
2 answers:
SSSSS [86.1K]3 years ago
5 0
Make fractions: 18/1 Multiply: 1/3 x 18/1 = 18/3 Solution: 18/3
polet [3.4K]3 years ago
4 0
The answer is six. All you have to do is divide 18 by 3.
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Test the given claim. Identify the null​ hypothesis, alternative​ hypothesis, test​ statistic, P-value, and then state the concl
Firlakuza [10]

Answer:

Being π1: proportion of passenger cars with only rear plates, and π2: proportion of commercial trucks with only rear plates, the null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2

The test statistic is z=-1.895.

The P-value is 0.029.

The P-value (0.03) is bigger than the significance level (0.01), so the effect is not significant. The null hypothesis failed to be rejected.

There is no enough evidence to claim that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars.

Step-by-step explanation:

The claim is that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars. We have to test the hypotheses on the difference between proportions.

Being π1: proportion of passenger cars with only rear plates, and π2: proportion of commercial trucks with only rear plates, the null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2

The significance level is 0.01.

The passenger cars, with a sample size n1=2135, have a proportion of:

p_1=x_1/N_1=244/2135=0.114

The commercial trucks, with a sample size n2=339, have a proportion of:

p_2=x_2/N_2=51/339=0.150

The weighted proportion, needed to estimate the standard error, is calculated as:

p=\dfrac{x_1+x_2}{N_1+N_2}=\dfrac{244+51}{2135+339}=\dfrac{295}{2474}=0.119

The standard error for the difference between proportions can be calculated as:

\sigma=\sqrt{\dfrac{p(1-p)}{N_1}+\dfrac{p(1-p)}{N_2}}=\sqrt{\dfrac{0.119*0.881}{2135}+\dfrac{0.119*0.881}{339}}\\\\\\\sigma=\sqrt{ 0.00036 }= 0.019

Then, the z-statistic is:

z=\dfrac{p_1-p_2}{\sigma}=\dfrac{0.114-0.150}{0.019}=\dfrac{-0.036}{0.019}=  -1.895

The P-value for this left tailed test is:

P-value=P(z

The P-value (0.03) is bigger than the significance level (0.01), so the effect is not significant. The null hypothesis failed to be rejected.

There is no enough evidence to claim that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars.

6 0
3 years ago
-10.0-(-3.4)<br><br> also you have to simplify your answer
uysha [10]
-13.4 is the answer. And this is simplified form
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Lorico [155]

Hey!

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Solution:

I would assume that the iron intake is combined between breakfast and lunch. So 8.25mg is too meals worth of iron. So all we have to do is subtract.

15 - 8.25 = 6.75

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Answer:

6.75mg are still needed for his daily intake.

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Hope This Helped! Good Luck!

8 0
3 years ago
I’ve been trying to figure out this question on my homework and I’ve been confused for days now.
dsp73

Answer:

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Hope this helps!!

Step-by-step explanation:

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